Complementary pass transistor logic pdf

Pdf 123 decision diagram is a very effective ptl synthesis tool based on binary decision diagram. Multiple sourcetodrain connected pass transistor logic ptl transistors are incorporated in the data path of the edgetriggered latch for converting a clock signal from the clock input into an edgetriggered data evaluation window. One of the first papers examining passtransistor logic and formalizing passtransistor design style was published by whitaker, in 1983 whitaker, electronics. The output node charges from 0 v ddv tn, and the energy drawn from the power supply for charging the output of a pass transistor is given by c l. Low power combinational and sequential circuits with. Ratioed logic pass transistortransmission gate logic dynamic cmos logic domino. However, new comparisons performed on more efficient cmos circuit realizations and a wider range of different logic cells, as well as the use of realistic circuit arrangements demonstrate cmos to be superior. The cpl consists of complementary inputsoutputs, an nmos passtransistor logic network, and cmos output inverters. In this paper we develop a karnaugh map based method that can be used to efficiently synthesize pass transistor logic circuits, which have balanced loads on true and complementary input signals. One of the first papers examining pass transistor logic and formalizing pass transistor design style was published by whitaker, in 1983 whitaker, electronics. Overview static cmos complementary cmos ratioed logic pass transistortransmission gate logic dynamic cmos logic domino npcmos. We propose advanced ic protection from differential power analysis attack though a hybrid logic style based on.

Decision diagrams and pass transistor logic synthesis. Cmos versus passtransistor logic reto zimmermann and wolfgang fichtner, fellow, ieee abstract recently reported logic style comparisons based on fulladder circuits claimed complementary passtransistor logic cpl to be much more poweref. Transistortransistorlogic topics the most commonly used bipolar logic family is transistortransistor logic. Passtransistorlogic xor gate using pass transistor logic. Cmosbased carbon nanotube passtransistor logic integrated. The essential circuit building blocks are an inverter and a transmission gate. Chargerecovery circuitry has the potential to reduce dynamic power consumption in digital systems with significant switching. The operation of an ntype pass transistor is similar to that of a ptype pass transistor, but in a complementary way. Pass transistor logic and complementary passtransistor logic cpl are becoming increasingly important in the design of a specic class of digital integrated. Basic pass transistor logic model f sum of products control signals pass signals v i p i 1 1 2 2 n n f p v p v p v. Vlsi design pass transistor logicpass transistor logic. A general method in synthesis of passtransistor circuits.

The proposed array multipliers performance in terms of delay, power and area is compared with conventional as well as baughwooley multiplier. Ambipolar transport, dual independent gates, carbon nanotube transistor, pass transistor logic, emerging technologies. All exploit pass transistors to implement general logic functions 22feb02 e4. Pass transistor logic xor gate using pass transistor logic. Actually, there are many different ttl families, with a range of speed, power consumption, and other characteristics. Digital integrated circuits combinational logic prentice hall 1995 overview static cmos conventional static cmos logic ratioed logic pass transistortransmission. Design of efficient complementary pass transistor based. Additional routing overhead for complementary signals still have static power dissipation problems ece 4121 l07 pass transistor logic.

Introduction the fundamental arithmetic operation which is widely used in dsp architectures and microprocessors is addition. Differential and passtransistor cmos digital circuits. Figure below shows the implementation of xor function using pass transistors. Pass transistor logic often uses fewer transistors, runs faster, and requires less power than the same function implemented with the same transistors in fully complementary cmos logic. The circuit examples in this section are based on a representative ttl family, lowpower schottky ls or lsttl. This technique uses the complementary properties of nmos and pmos transistors. The twophase powerclock scheme is more suitable for the design of. Cmos versus passtransistor logic reto zimmermann and wolfgang fichtner, fellow, ieee abstract recently reported logic style comparisons based on fulladder circuits claimed complementary pass transistor logic cpl to be much more poweref. Logic network employs input signals at both gate and drain terminals. Poweraware alternative adder cell structure using swing. The list of acronyms and abbreviations related to cpl complementary passtransistor logic. Cpal circuits have more efficient energy transfer and recovery, because the nonadiabatic energy loss of output loads has been completely eliminated by using complementary pass transistor logic for evaluation and. Problem on nmos pass transistor logic gate 2014 ece paper solution duration. Section iii presents the rules for algorithmic and systematic synthesis of complementary and dual logic functions, with.

Logic gates digital circuit that either allows signal to pass through it or not used to build logic functions seven basic logic gates. In this gate if the b input is low then left nmos transistor is on and the logic value of a is copied to the output f. Nmos is effective at passing a 0, but poor at pulling a node to vdd. A binary decision diagrambased topdown design method with coding, realisation and simplification step is. The paper investigates low power characteristics of complementary pass transistor logic cpl circuits using ac power supply.

Mod01 lec15 pass transistor logic circuits ii youtube. Pass transistor logicpass transistor logic adapted from rabaeys digital integrated circuits, 2002. Complementary cmos logic gates nmos pulldown network pmos pullup network a. However, new comparisons performed on more efficient cmos circuit realizations and a wider range of different logic cells, as well as the use of realistic. Pdf general design method for complementary pass transistor. Introduction to passtransistor logic technical articles. Recently, we proposed the cpal complementary pass transistor adiabatic logic using fourphase powerclocks 7, 8. Pass transistor logic adapted from rabaeys digital integrated circuits, second edition, 2003 j. General design method for complementary pass transistor logic. Multiple sourcetodrain connected passtransistor logic ptl transistors are incorporated in the data path of the edgetriggered latch for converting a clock signal from the clock input into an edgetriggered.

The result is in some cases conceptual simplification, but the cmos inverters strict logichighlogiclow output characteristic is lost. Oct 09, 2012 pass transistor logic october 9, 2012 7 8. Jun 21, 2012 mod01 lec15 pass transistor logic circuits ii nptelhrd. In this paper we develop a karnaugh map based method that can be used to efficiently synthesize passtransistor logic circuits, which have balanced loads on true and complementary input signals.

Nmos devices passes a strong 0 but a weak 1 while pmos transistors pass a strong 1 but a weak 0. Complementary pass transistor logic cpl is a new family of advanced differential cmos logic that has much higher speed and lower power consumption compared to conventional static cmos logic 1. The method consists of the implementation of the gates. The complementary pass transistor logic will help in a great. Complementary pass transistor logic cpl is becoming increasingly important in the design of a specific class of digital integrated circuits which employ the xor and mux operations. Lowpower adiabatic sequential circuits with complementary. Recently, we proposed the cpal complementary passtransistor adiabatic logic using fourphase powerclocks 7, 8. The logic circuit includes a pass transistor logic circuit, a cmos transistor pair connected as an inverter and having an input coupled to the output of the pass transistor logic circuit, a clocking transistor coupled between the inverter and a potential terminal to. Not logic gates are constructed by combining transistors. Recently reported logic style comparisons based on fulladder circuits claimed complementary passtransistor logic cpl to be much more powerefficient than complementary cmos. A logic circuit and associated method are provided to improve the switching performance of integrated circuit devices. In this paper, we have designed full adder circuits using cpl and cmos logic respectively. This paper compares the use of complementary passtransistor logic cpl as more powerefficient than conventional cmos design.

Combinational logic gates in cmos purdue university. Complementary cmos logic style construction pun is the dual of pdn can be shown using. Logic circuits dapted from cmos logic circuit design by john p. And, or, not, nandnot and, nornot or, xor xnornot xor 9 did you know.

General method in synthesis of passtransistor circuits eecs at uc. Pass transistor logic and complementary pass transistor logic cpl are becoming increasingly important in the design of a specic class of digital integrated. The complementary passtransistor logictransmission gate cpltg full adder implementation provided an energy savings of 50% compared to the conventional cmos full adder. High performance complementary pass transistor logic full. Pass transistors require lower switching energy to charge up a node, due to the reduces voltage swing. Other authors use the term complementary pass transistor logic cpl to indicate a style.

He was born in lincoln, england and he was the son of a shoemaker. Cpal circuits have more efficient energy transfer and recovery, because the nonadiabatic energy loss of output loads has been completely eliminated by using complementary passtransistor logic for evaluation and. Pdf behavior of basic and complex logic gates using complementary passtransistor logic cpl under various singlestuck faults are investigated. Design of sequential circuit using low power adiabatic. The paper describes how the logic functions can be efficiently and optimally built using passtransistor logic.

In electronics, pass transistor logic ptl describes several logic families used in the design of. It shows some fundamental pass transistor building blocks which became. Full adder design with 10 transistors using xorxnor gates is also reported in 6. The transmission gate logic is used to solve the voltage drop problem of the pass transistor logic. Pdf behavior of basic and complex logic gates using complementary pass transistor logic cpl under various singlestuck faults are investigated. Complementary pass transistor logic a b a b b a b a b fab. The paper describes how the logic functions can be efficiently and optimally built using pass transistor logic. The main concept behind the cpl is the use of an nmos pass transistor network for logic organization and elimination of the pmos latch.

Though it has high speed due to low input capacitance, it has limited capacity to drive a load. A general and effective complementary pass transistor logic design method is presented for pipeline circuits. Mod01 lec15 pass transistor logic circuits ii nptelhrd. In normal implementation procedure we use the cmos logic. Us6462582b1 clocked pass transistor and complementary. Pdf testing complementary passtransistor logic circuits. A transmission gate fulladder tga presented in 15 contains 20 transistors. These are some of the commonly used technologies out of the many. Transistor transistor logic topics the most commonly used bipolar logic family is transistor transistor logic. The truth table of xor gate is as shown in table below. Hybrid pass transistor logic with dualgate ambipolar cntfets. We analyze their delay and power dissipation, and run the simulations of two full adder circuits. Passtransistor logic ptl, also known as transmissiongate logic, is based on the use of mosfets as switches rather than as inverters.

Recently reported logic style comparisons based on fulladder circuits claimed complementary pass transistor logic cpl to be much more powerefficient than complementary cmos. Fault characterization, testability issue and design. Transmissiongate digitalcmosdesign electronics tutorial. General design method for complementary pass transistor. The emergence and proliferation of smart cards and other securitycentric technologies require ongoing advancement in secureic design. Conventional static cmos logic ratioed logic pass transistor transmission gate logic. The issues of scaling to lower power supply voltages and threshold voltages will also be dealt with. Complementary passtransistor logic a general method of karnaugh map coverage and mapping into circuit realizations is applied to design logic andnand, ornor, and xorxnor gates in cpl. Additionally we have static cmos, differential pass transistor logic, lean integration pass transistor logic and complementary pass transistor logic. A general method in synthesis of passtransistor circuits people. We propose advanced ic protection from differential power analysis attack though a hybridlogic style based on. The design of logic circuits was based on a particular type of complementary logic known as pass transistor logic 15.

The edgetriggered latch of the present invention includes a data input and a clock input. Remember nmos transistors pass a strong 0 but a weak 1. A hybrid cmos logic style adder with 22 transistors is reported 7. Jan 09, 2003 a general and effective complementary pass transistor logic design method is presented for pipeline circuits. Some logical circuits using ptl pass transistor logic october 9, 2012 8 9. Ratioed logic use pdn to implement the function which is the negation of the network. Nmos devices passes a strong 0 but a weak 1 while pmos transistors pass a. Largescale complementary integrated circuits based. Cmpen 411 vlsi digital circuits spring 2012 lecture 07. Adiabatic logic style is proving to be an attractive solution for low power digital design. A selfchecking cmos full adder in double pass transistor. Implementation of low power cmos full adders using pass. In order to optimize the power and area of the multiplier, a cpl based mbe with standard partial product array.

Reduce the number of devices over complementary logic. Us6462582b1 clocked pass transistor and complementary pass. A new family of advanced differential cmos logic, complementary pass transistor logiccpl is proposed and fully utilized on. This paper compares the use of complementary pass transistor logic cpl as more powerefficient than conventional cmos design. Nov 08, 2017 problem on nmos pass transistor logic gate 2014 ece paper solution duration. A binary decision diagrambased topdown design method with coding, realisation and simplification step is proposed and applied to realise a logic function. On the use of complementary pass transistor logic for. Complementary pass transistor logic a general method of karnaugh map coverage and mapping into circuit realizations is applied to design logic andnand, ornor, and xorxnor gates in cpl.