采用二相功率时钟的无悬空输出绝热CMOS电路

分析了 PAL 及 PAL- 1电路中输出悬空对电路性能的影响 ,强调在绝热电路设计中消除悬空输出的重要性 .提出了两种新的结构互补且无悬空输出的绝热电路 .PSPICE模拟证明它们能有效实现能量恢复 ,并使输出信号在整个有效输出期始终处于箝位状态     

采用二相功率时的无悬空输出绝热CMOS电路

分析了PAL及PAL－1电路中输出悬空对电路性能的影响,强调在绝热电路设计中消除悬空输出的重要性。提出了两种新的结构互补且无悬空输出的绝热电路,PSPICE模拟证明它们能有效实现能量恢复,并使输出信号在整个有效输出期始终处于箝位状态。     

一种交叉耦合低功耗传输门绝热逻辑电路

提出了一种新的能量恢复型电路—— Transmission Gate Adiabatic Logic(TGAL)。该电路由交叉耦合的 CMOS传输门完成逻辑运算与能量恢复 ,对负载的驱动为全绝热过程。TGAL电路输出端始终处于箝位状态 ,在整个输出期不存在悬空现象并具有良好的信号传输效果。分析了 TGAL反相器的能耗 ,并与静态 CMOS电路及部分文献中绝热电路进行了比较。使用 TGAL构成门电路与时序系统的实例被演示。应用 MOSIS的0 .2 5 μm CMOS工艺参数的模拟结果表明 ,与传统 CMOS和 2 N-2 N2 P绝热电路相比 ,TGAL电路在 1 0 0 MHz工作频率时分别节省 80 %与 60 %以上的功耗。     

能量恢复型CVSL电路的设计及其应用

提出了采用交流能源的级联电压开关逻辑(CVSL)电路,其主要特点是输出与输入信号呈现相同相位,并消除了输出端悬空现象,适合于实现低功耗组合电路。应用0.25μmCMOS标准工艺的SPICE模拟表明,提出的电路具有正确的逻辑功能与可观的能量节省。     

静态绝热CMOS记忆电路和信息恢复能力

通过等效电路分析、考虑参数选取和整体时序电路的实现 ,提出具有信息恢复能力的静态绝热 CMOS记忆电路 .认为整体绝热电路结构最好融合输入、输出电路和记忆电路、时序电路为一体 ,由主触发器集合和从触发器集合相互连接构成 ,其中含有输出和反馈从触发器 .采用绝热取样输入电路实现信息记忆单元接收代码和保存信息时将信息单元与外输入隔离 .还设计出 5 4 2 1BCD码 10进制和 7进制可变计数器 (带有进位输出从触发器和反馈清 0从触发器 ) ,用计算机模拟程序检验电路的正确性     

静态绝热CMOS记忆电路和信息恢复能力

通过等效电路分析、考虑参数选取和整体时序电路的实现,提出具有信息恢复能力的静态绝热CMOS记忆电路.认为整体绝热电路结构最好融合输入、输出电路和记忆电路、时序电路为一体,由主触发器集合和从触发器集合相互连接构成,其中含有输出和反馈从触发器.采用绝热取样输入电路实现信息记忆单元接收代码和保存信息时将信息单元与外输入隔离.还设计出5421BCD码10进制和7进制可变计数器(带有进位输出从触发器和反馈清0从触发器),用计算机模拟程序检验电路的正确性.     

静态绝热CMOS记忆电路和信息恢复能力

通过等效电路分析、考虑参数选取和整体时序电路的实现,提出具有信息恢复能力的静态绝热CMOS记忆电路.认为整体绝热电路结构最好融合输入、输出电路和记忆电路、时序电路为一体,由主触发器集合和从触发器集合相互连接构成,其中含有输出和反馈从触发器.采用绝热取样输入电路实现信息记忆单元接收代码和保存信息时将信息单元与外输入隔离.还设计出5421BCD码10进制和7进制可变计数器(带有进位输出从触发器和反馈清0从触发器),用计算机模拟程序检验电路的正确性.     

抑制CMOS输出端口反向漏电设计

提出了抑制CMOS输出端口反向漏电的结构,当电源端接地或者悬空,CMOS输出端口接高电平时,通过优化控制逻辑,由输出端口为电路提供电源电压,从而抑制了输出端口对电源端口的漏电。以华润微电子0.25μm 5 V工艺实现电路版图并流片,典型漏电为0.01μA。     

采用三相电源的互补传输管绝热逻辑电路

提出了一种由三相电源驱动的新绝热逻辑电路--complementary pass-transistor adiabatic logic(CPAL).电路由CPL电路完成相应的逻辑运算,由互补传输门对输出负载进行绝热驱动,电路的整体功耗较小.指出选取合适的输出驱动管的器件尺寸可进一步减小CPAL电路的总能耗.设计了仅由一个电感和简单控制电路组成的三相功率时钟产生电路.为了验证提出的CPAL电路和时钟产生电路,设计了8bit全加器进行模拟试验.采用MOSIS的0.25μm CMOS工艺,在50～200MHz频率范围内,CPAL全加器的功耗仅为PFAL电路和2N-2N2P电路的50%和35%.     

能量回收电路的功耗优化方法

能量回收电路的非绝热损失正比于CLΔV2,文中提出了两种方法降低CL和ΔV因子.HEERL(high efficient energy recovery logic)电路利用自举效应减小了回收节点的残留电压ΔV,IERL(improved energy recovery logic)电路增加了回收的通路,在控制回收通路的小电容节点产生了CAΔV2的非绝热损失,从而使大电容输出节点电荷被充分回收,降低了电路的整体功耗.降低非绝热损失两个因子CL和ΔV的能量回收电路与其它能量回收电路相比,电路面积增加很小(2个NMOS管),而功耗可降低50%以上.     

Improved structure for adiabatic CMOS circuits design

Two adiabatic circuits with complementary structure and operation are proposed in this paper. They employ two-phase sinusoidal power clock. The power consumption of the proposed circuits is comparable to that of some previously reported circuits. The problem of floating output nodes is solved by connecting two MOS transistors to the power clock. In particular, using the proposed architecture more than one stage of gates can be computed simultaneously within a single clock-phase, compared to only one stage is computed in every phase by most other adiabatic logic families. With this feature, the latency of the complex logic circuit is greatly improved and the number of buffers required for a pipelining circuit is also reduced. In this paper, a 2:1 multiplexer and full adder are illustrated and simulated. From the PSPICE simulation results, the effectiveness of the proposed approach and the low power characteristic of the designed circuits are validated.     

Design of a DTCTGAL circuit and its application

By research on the switch-signal theory for multiple-valued logic circuits, the theory of three essential elements and the principle of adiabatic circuits, a design scheme for a double power clock ternary clocked transmission gate adiabatic logic (DTCTGAL) circuit is presented. The energy injection and recovery can be conducted by the bootstrapped NMOSFET, which makes the circuit maintain the characteristics of energy recovery as well as multiple-valued input and output. An XOR/XNOR circuit based on DTCTGAL is also presented using this design scheme. Finally, using the parameters of a TSMC 0.25 μm CMOS device, PSPICE simulation results indicate that the proposed circuits have correct logic and significant low power characteristics.     

Modified Hebbian auto-adaptive impulse neural circuits

Artificial neural networks learn by adapting interconnection weights. A generalised weight adaptation expression for associative learning has been implemented using synapse circuits based on floating gate devices. A reinforcement depending on the correlation of a synapse input and a neuronal output is used. The circuits also illustrate the influence of the conditioning stimuli amplitude on the conditioning rate.<>     

二值、多值和绝热电路通用的电路理论

本文提出二值、多值和绝热电路通用的电路理论,即电路三要素(信号,网络和负载)理论.为此首先提出普适的N+1值代数,推出网络转换定理和常用公式,用来直接由多值函数或触发器的特征方程推出它们的元件级结构.当N充分大时该理论可推广到绝热电路,从而在绝热约束条件下完成绝热电路定量分析与综合,用于诸如交叉耦合绝热触发器和绝热同步时序电路,由计算机模拟检验其正确性.     

具有交叉耦合结构的能量恢复型电路

本文从改变能量传输方式的观点出发讨论了ＣＭＯＳ电路中的绝热开关原理,并对如何实现恢复进行了分析。本言语重点对具有交 耦合结构的绝热电路的特性作了分析比较,并在ＰＡＬ电路诉基础上提出了一种与之相补的绝热电路－ＰＡＬ－１电路。     

Low-power interface circuits between adiabatic and standard CMOS circuits

The clocking schemes and signal waveforms of adiabatic circuits are different from those of standard CMOS circuits. This paper investigates the design approaches of low-power interface circuits in terms of energy dissipation. Several low-power interface circuits that convert signals between adiabatic logic and standard CMOS circuits are presented. All interface circuits and their layouts are implemented using TSMC 0.18 μm CMOS technology. The function verifications and energy loss tests for all interfaces are carried out using the net-list extracted from the layout. Full parasitic extraction is done. An adiabatic 8-bit carry look-ahead adder embedded in a static CMOS circuits is used to verify the proposed interfaces. The proposed interface circuits attain large energy savings over a wide range of frequencies, as compared with the previously reported circuits.     

Derivation of low-power first-order low-pass,high-pass and all-pass filters

In this letter, a new voltage-mode (VM) configuration for providing low-power and simultaneous realization of first-order low-pass, high-pass and all-pass filters is presented. The output of the all-pass filter is taken differentially. The proposed circuit contains low number of components, i.e., only two NMOS transistors, a floating battery, a grounded capacitor and a floating resistor. Adding two NMOS transistors to the proposed circuit it is modified as an all-pass filter with a single-ended output. The main advantage of the presented circuits in comparison with other counterparts is their extremely low power dissipation. Moreover, the floating resistor can be replaced with an additional NMOS transistor in triode region to provide electronic tunability. Simulation results using SPICE program are given to demonstrate the performance of the proposed circuit.