Voltage difference transresistance amplifier and its application: floating FDNR simulator circuit

In this article, a new active building component with electronically tunable transresistive block, voltage difference transresistance amplifier, and its floating frequency dependent negative resistor simulator circuit application is presented. The simulator circuit is shown to operate using single active building block with two grounded passive components, to be electronically tunable over its value which is controlled by an independent current source, not to require any conditions of component matching and to have good sensitivity performance with respect to tracking errors. To examine functionality of the design, a CRD band-pass filter example is given.

Numerous simulation program with integrated circuit emphasis (SPICE) simulations are performed and depicted through the article to verify validity of the study. Taiwan semiconductor manufacturing company (TSMC) 0.18 µm complementary metal oxide semiconductor technology parameters are used through simulations.     

A Versatile Active Circuit for Realising Floating Inductance, Capacitance, FDNR and Admittance Converter

An active circuit suitable for realizing floating inductance, capacitance, FDNR and admittance converter depending on the selection of passive elements of the circuit is presented. The proposed circuit employs only two dual output second-generation current conveyors (DO-CCIIs) and does not require passive element matching. The proposed network has a grounded capacitor for the floating inductance and capacitance simulation. Frequency performance of the circuit is tested using SPICE.     

A design of MOSFET‐C impedance simulation circuits based on a GIC

This paper proposes a systematic design method of MOSFET‐C impedance simulation circuits based on a generalized immittance converter (GIC). The design method can realize inductance simulation circuits, capacitance multipliers and frequency‐dependent negative resistances (FDNRs) only by MOSFETs, capacitors and two operational amplifiers. Although MOSFETs are used instead of passive resistors, the realized impedance simulation circuits have good linearity since the nonlinearity caused by MOSFETs are cancelled out. The proposed design method derives three inductance simulation circuits, five capacitance multipliers and two FDNRs systematically from a GIC. All of them are summarized in this paper. As an example, inductance simulation circuits are designed by using the proposed design method. The inductance simulation circuits are applied to a filter realization and validity of the design method is confirmed by HSPICE simulations. Copyright © 2007 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.     

利于集成且对杂散电容抑制性极佳的开关电容型滤波器

采用单位缓冲器设计对杂散电容不灵敏的开关电容(SC)频率相关负电阻(FDNR)元件,利用该元件对椭园函数式LC低通滤波器进行SC模拟。为了获得电容最佳值,提出了一种简单的最优化方法。并采用寄生电阻预畸变与SC负电阻相结合的办法,设计的SC滤波器对杂散电容不灵敏,且电路简单。本文采用分立元件制作了一个五阶椭园低通SC-FDNR滤波器,实验结果表明该方法实用可行,效果明显。     

小功率电源SC-FDNR滤波器的设计

设计了一种小功率电源有源滤波器：利用一个单位缓冲器设计了对寄生电容不灵敏的开关电容 (SC) 频率相关负电阻(FDNR) 元件，利用该元件对椭园函数式LC低通滤波器进行SC模拟。为了获得电容最佳值，提出了一种简单的最优化方法；并采用寄生电阻预畸变与SC负电阻相结合的办法，设计的SC滤波器对寄生电容不灵敏，而且电路简单。本文用分立元件制作了一个五阶椭园低通SC-FDNR滤波器，实验结果表明该方法实用可行，效果明显。     

On the systematic synthesis of CCII‐based floating simulators

This paper is adopting a new approach in the systematic synthesis of CCII‐based floating simulators. The synthesis procedure is based on the generalized systematic synthesis framework for active circuits using admittance matrix expansion. The resulting derived floating simulators include circuits that have been reported earlier in the literature in addition to novel floating simulators using various types of CCII. The synthesized floating simulators can be used to realize floating coils, FDNRs, and resistance and capacitance multipliers; according to the types of passive elements employed in the design. The potentials and drawbacks of every one of the synthesized circuits vary according to the design tradeoffs including complexity, number of active devices, number and values of grounded and floating passive elements, matching requirements, and tunability. SPICE simulations are presented to verify the performance of the new circuits obtained by systematic synthesis and hence demonstrate the potentials of the generalized synthesis framework in producing novel circuits with high performance. Copyright © 2009 John Wiley & Sons, Ltd.     

On the realization of the floating simulators using only grounded passive components

In this paper, two novel circuits for realizing floating inductance, floating capacitance, floating frequency dependent negative resistance (FDNR) and grounded to floating admittance converter depending on the passive component selection are proposed. Both of the proposed simulators employ second-generation current controlled conveyors (CCCIIs) and only grounded passive elements. The non-ideal current and voltage gain as well as parasitic impedance effects on the first proposed circuit are investigated. Also, simulation results using SPICE program are given for the first introduced floating simulator to verify the theory and to exhibit the performance of the circuit.     

对寄生电容不灵敏的开关电容有源滤波器的设计

采用单位缓冲器设计对寄生电容不灵敏的开关电容(SC)频率相关负电阻(FDNR)元件，利用该元件对椭圆函数式LC低通滤波器进行SC模拟。为了获得电容最佳值，提出了一种简单的最优化方法；并采用寄生电阻预畸变与SC负电阻相结合的办法，设计的SC滤波器对寄生电容不灵敏，且电路简单。在电子工作平台(EWB)上进行五阶椭圆低通SC-FDNR滤波器仿真，测量数据最大相对误差为0．948％，仿真结果表明该方法实用可行，效果明显。     

用频变负电阻实现的混沌振荡器

提出了用频变负电阻(FDNR)实现混沌振荡器的新电路，试电路结构简单，仅用一个接地的频变负电阻作为有源器件，用二极管提供必要的非线性．文中给出了PSpice仿真验证了结果。     

A floating generalized impedance converter with current feedback operational amplifiers

A novel generalized impedance converter topology realized using current feedback operational amplifiers is introduced in this paper. The main offered benefit, in comparison to the corresponding already published structure, is that frequency dependent negative resistors can now be also realized. Other benefits are the requirement for only grounded capacitors, the lower component count, and the capability of tuning through a grounded resistor. The correct operation of the proposed GIC has been verified through a design example, where a 3rd-order lowpass filter has been topologically simulated.