scholarly journals New Current-Mode Oscillators Using Unity-Gain Current-Followers

1995 ◽  
Vol 18 (3) ◽  
pp. 159-164 ◽  
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Current Mode ◽  
Unity Gain ◽  
Simulation Results ◽  
Oscillator Circuits

A catalog of current-mode oscillator circuits using negative unity-gain current-followers is presented. Each circuit uses two unity-gain current-followers, three resistors, and three capacitors . Simulation results obtained from two new circuits are presented.

scholarly journals New Current-Mode Oscillators Using a Single Unity-Gain Current-Follower

1995 ◽  
Vol 18 (3) ◽  
pp. 151-157 ◽  
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Current Mode ◽  
Quadrature Oscillator ◽  
Current Follower ◽  
Unity Gain ◽  
Simulation Results

A general circuit for realizing current-mode oscillators using a single negative unity-gain current-follower is presented. Using this circuit new oscillators of this class can be discovered systematically. Simulation results obtained from three new circuits are presented. The feasibility of obtaining a quadrature oscillator is investigated.

NEW GROUNDED-CAPACITOR CURRENT-MODE OSCILLATORS USING SINGLE-OUTPUT CCIIS

1998 ◽  
Vol 08 (03) ◽  
pp. 363-378 ◽  
Author(s):  
AHMED M. SOLIMAN
Keyword(s):  
Current Mode ◽  
Class Ii ◽  
Class I ◽  
Class Iii ◽  
Pspice Simulation ◽  
Single Output ◽  
Simulation Results ◽  
Oscillator Circuits

In this paper five novel minimal-C and grounded-C current-mode oscillators, using single output CCIIs are reported. The proposed oscillators are classified into three classes based on the number of CCIIs used. The oscillator circuits of class I employ two CCII+s, whereas the class II oscillator employs three CCII+s and those of the class III employ four CCII+s. PSpice simulation results demonstrating the performance of the proposed oscillators are included.

scholarly journals Current-Mode Third-Order Quadrature Oscillator Using CDTAs

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
Jiun-Wei Horng
Keyword(s):  
Theoretical Analysis ◽  
Phase Difference ◽  
Oscillation Frequency ◽  
Current Mode ◽  
Third Order ◽  
Quadrature Oscillator ◽  
Oscillation Condition ◽  
Transconductance Amplifiers ◽  
Simulation Results ◽  
A Current

This paper describes a current-mode third-order quadrature oscillator based on current differencing transconductance amplifiers (CDTAs). Outputs of two current-mode sinusoids with90°phase difference are available in the quadrature oscillator circuit. The oscillation condition and oscillation frequency are orthogonal controllable. The proposed circuit employs only grounded capacitors and is ideal for integration. Simulation results are included to confirm the theoretical analysis.

scholarly journals Analog Low-Voltage Current-Mode Implementation of Digital Logic Gates

2003 ◽  
Vol 26 (2) ◽  
pp. 111-114 ◽  
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Power Series ◽  
Low Voltage ◽  
Logic Gates ◽  
Current Mode ◽  
New Technique ◽  
Basic Logic ◽  
Spice Simulation ◽  
Simulation Results ◽  
A New Technique ◽  
Logic Functions

In this letter a new technique is introduced for implementing the basic logic functions using analog current-mode techniques. By expanding the logic functions in power series expressions, and using summers and multipliers, realization of the basic logic functions is simplified. Since no transistors are working in saturation, the problem of fan-out is alleviated. To illustrate the proposed technique, a circuit for simultaneous realization of the logic functions NOT, OR, NAND and XOR is considered. SPICE simulation results, obtained with 3 V supply, are included

scholarly journals Gm-Realization of Controlled-Gain Current Follower Transconductance Amplifier

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Worapong Tangsrirat
Keyword(s):  
Current Mode ◽  
Cmos Technology ◽  
Current Transfer ◽  
Biquad Filter ◽  
Transconductance Amplifier ◽  
Current Follower ◽  
Dc Bias ◽  
Simulation Results ◽  
Supply Voltages ◽  
A Current

This paper describes the conception of the current follower transconductance amplifier (CFTA) with electronically and linearly current tunable. The newly modified element is realized based on the use of transconductance cells (Gms) as core circuits. The advantage of this element is that the current transfer ratios (iz/ipandix/iz) can be tuned electronically and linearly by adjusting external DC bias currents. The circuit is designed and analyzed in 0.35 μm TSMC CMOS technology. Simulation results for the circuit with ±1.25 V supply voltages show that it consumes only 0.43 mw quiescent power with 70 MHz bandwidth. As an application example, a current-mode KHN biquad filter is designed and simulated.

Improved Electronically-Tunable Current-Mode Square-Root-Domain First-Order Multifunction Filter

2021 ◽  
pp. 2150190
Author(s):  
Manoj Kumar Jain
Keyword(s):  
Transient Response ◽  
Current Mode ◽  
Square Root ◽  
Spice Simulation ◽  
First Order ◽  
Low Pass ◽  
Multifunction Filter ◽  
Simulation Results ◽  
Electronically Tunable ◽  
High Pass

Some time back, Kircay reported an electronically-tunable current-mode square-root-domain first-order filter capable of realizing low-pass (LP), high-pass (HP) and all-pass (AP) filter functions. When simulated in SPICE, Kircay’s circuit has been found to exhibit DC offsets in case of LP and AP responses and incorrect transient response in case of HP response. In this paper, an improved circuit overcoming these difficulties/deficiencies has been suggested and its workability of the improved circuit as well as its capability in meeting the intended objectives has been demonstrated by SPICE simulation results.

ACTIVE-FEEDBACK SINGLE MILLER CAPACITOR FREQUENCY COMPENSATION TECHNIQUES FOR THREE-STAGE AMPLIFIERS

2010 ◽  
Vol 19 (07) ◽  
pp. 1381-1398 ◽  
Author(s):  
MOHAMMAD YAVARI
Keyword(s):  
Low Power ◽  
Small Signal ◽  
Frequency Compensation ◽  
Gain Bandwidth ◽  
Silicon Area ◽  
Active Feedback ◽  
In Series ◽  
Unity Gain ◽  
Simulation Results ◽  
A Current

This paper presents two novel active-feedback single Miller capacitor frequency compensation techniques for low-power three-stage amplifiers. These techniques include the active-feedback single Miller capacitor frequency compensation (AFSMC) and the dual active-feedback single Miller capacitor frequency compensation (DAFSMC). In the proposed techniques, only one Miller capacitor in series with a current buffer is utilized. The main advantages of the proposed three-stage amplifiers are the enhanced unity-gain bandwidth and the reduced silicon area. Small-signal analyses are performed and the design equations are obtained. Extensive HSPICE simulation results are provided to show the usefulness of the proposed AFSMC and DAFSMC amplifiers in both large and small capacitive loads.

Single Inductor Bipolar Outputs DC-DC Converter with Current Mode Control Circuit

2013 ◽  
Vol 534 ◽  
pp. 220-226 ◽  
Author(s):  
Nobukazu Takai ◽  
Takashi Okada ◽  
Kenji Takahashi ◽  
Hajime Yokoo ◽  
Shunsuke Miwa ◽  
...  
Keyword(s):  
Power Supply ◽  
Supply Voltage ◽  
Current Mode ◽  
Cmos Process ◽  
Power Supply Voltage ◽  
Negative Power ◽  
Current Mode Control ◽  
Mode Control ◽  
Digital Still Camera ◽  
Simulation Results

Mobile equipment such as organic-EL display, digital still camera and so on re-quire both positive and negative power supply voltage to obtain high quality. Single InductorMultiple-Output (SIMO) DC-DC converter can provide a pair of positive and negative outputvoltages with only one external inductor. This paper describes SIMO DC-DC Converter usingproposed current-mode control (CMC) circuit. The proposed CMC circuit realizes high responsespeed for the change of load current. Spectre simulations with 0.18m CMOS process parameterare performed to verify the validity of the proposed converter. The simulation results indicatethat the proposed converter has higher response time compared with conventional converter.

scholarly journals Dual-mode multifunction filter realized with a single voltage differencing gain amplifier (VDGA)

2021 ◽  
Vol 41 (2) ◽  
Author(s):  
Worapong Tangsrirat ◽  
Tattaya Pukkalanun ◽  
Orapin Channumsin
Keyword(s):  
Current Mode ◽  
Angular Frequency ◽  
Cmos Process ◽  
Dual Mode ◽  
Biquad Filter ◽  
Multifunction Filter ◽  
Circuit Component ◽  
Simulation Results ◽  
Quality Factor Q ◽  
Circuit Configuration

This article presents the dual-mode multifunction biquad filter realized employing only a single voltage differencing gain amplifier (VDGA), one resistor and three capacitors. The proposed filterwith one input and three outputs can configure as voltage-mode or current-mode filter circuit with the appropriate input injection choice. It can also synthesis the three standard filter functions, which are highpass, bandpass, and lowpass responses without modifying the circuit configuration. Orthogonal adjustment between the natural angular frequency (o) and the quality factor (Q) of the filter is achieved. Detail analysis of non-ideal VDGA effects and circuit component sensitivity are included. The circuit principle is verified by means of simulation results with TSMC 0.35-m CMOS process parameters.

Sign in / Sign up

Export Citation Format

Share Document