Low Voltage Operated Current-Mode First-Order Universal Filter and Sinusoidal Oscillator Suitable for Signal Processing Applications

2019 ◽  
Vol 99 ◽  
pp. 110-118 ◽  
Author(s):  
Bhartendu Chaturvedi ◽  
Atul Kumar ◽  
Jitendra Mohan
Keyword(s):  
Signal Processing ◽  
Low Voltage ◽  
Current Mode ◽  
Universal Filter ◽  
First Order ◽  
Sinusoidal Oscillator

CMOS FIRST-ORDER CURRENT-MODE ALL-PASS FILTER WITH ELECTRONIC TUNING CAPABILITY AND ITS APPLICATIONS

2013 ◽  
Vol 22 (03) ◽  
pp. 1350007 ◽  
Author(s):  
LEILA SAFARI ◽  
SHAHRAM MINAEI ◽  
ERKAN YUCE
Keyword(s):  
Integrated Circuit ◽  
Low Voltage ◽  
Current Mode ◽  
Passive Component ◽  
Pass Filter ◽  
First Order ◽  
Sinusoidal Oscillator ◽  
Minimum Number ◽  
Component Matching ◽  
Electronically Tunable

In this paper, a novel first-order current-mode (CM) electronically tunable all-pass filter including one grounded capacitor and two dual-output current followers (DO-CFs) is presented. The used DO-CFs are implemented using only 10 MOS transistors granting the proposed CM all-pass filter extremely simple structure. The proposed filter is suitable for integrated circuit (IC) fabrication because it employs only a grounded capacitor and is free from passive component matching conditions. Interestingly the introduced configuration uses minimum number of components compared to other works. It also offers other interesting advantages such as, alleviating all disadvantages associated with the use of resistors, easy cascadability and satisfies all technology requirements such as small sizing, simple realization, low voltage and low power operation. Additionally, the circuit parameters can be easily set by adjusting control voltages. Most favorably, the proposed CM all-pass filter can be simply used as a voltage-mode (VM) all-pass filter with outstanding properties of adjustable gain and tunability. To further show the versatility of the proposed structure a sinusoidal oscillator is also derived from presented CM all-pass filter. Nonideal gain and parasitic impedance effects on developed CM filter are discussed. Finally, simulation results with SPICE program are included to confirm the theory.

scholarly journals A Current Mode Universal Filter and a Single Resistance Controlled Oscillator Employing only Grounded Passive Elements: Applications of VDCC

2021 ◽  
Vol 25 (2) ◽  
pp. 65-76
Author(s):  
Tajinder Singh Arora ◽  
Keyword(s):  
Integrated Circuit ◽  
Current Mode ◽  
Paper Analysis ◽  
Current Conveyor ◽  
Universal Filter ◽  
Dual Mode ◽  
Passive Element ◽  
Research Article ◽  
Sinusoidal Oscillator ◽  
A Current

This research article explores the possible applications of voltage differencing current conveyor (VDCC), as a current mode universal filter and a sinusoidal oscillator. Without the need for an additional active/passive element, a very simple hardware modification makes it a dual-mode quadrature oscillator from the filter configuration. Both the proposed circuit requires only two VDCC and all grounded passive elements, hence a preferable choice for integration. The filter has some desirable features such as availability of all five explicit outputs, independent tunability of filter parameters. Availability of explicit quadrature current outputs, independence in start and frequency of oscillations, makes it a better oscillator design. Apart from prevalent CMOS simulation results, VDCC is also realized and experimentally tested using the off-the-shelf integrated circuit. All the pen and paper analysis such as non-ideal, sensitivity and parasitic analysis supports the design.

An Active-C Current-Mode Universal First-Order Filter and Oscillator

2019 ◽  
Vol 28 (13) ◽  
pp. 1950219 ◽  
Author(s):  
D. Agrawal ◽  
S. Maheshwari
Keyword(s):  
Transfer Functions ◽  
Current Mode ◽  
Cmos Technology ◽  
Monte Carlo Analysis ◽  
Passive Element ◽  
First Order ◽  
Order Filter ◽  
Sinusoidal Oscillator ◽  
High Output Impedance ◽  
Electronically Tunable

This paper presents an electronically tunable current-mode first-order universal filter. The proposed circuit employs only a single Extra-X Current-Controlled Conveyor (EX-CCCII) and a single grounded capacitor, which is suitable for IC implementation. The circuit can realize three current transfer functions simultaneously, namely low-pass, high-pass and all-pass. The proposed circuit exhibits low-input and high-output impedance, which is suitable for cascading. The pole frequency of the filter can be electronically tuned, by varying the bias current of EX-CCCII. The nonidealities and parasitic effects on the circuit performance are investigated in detail. Also, the Monte Carlo analysis is done to show the effect of active and passive element mismatches on the pole frequency. An eight-phase current-mode sinusoidal oscillator and current-mode second-order filter are further realized using the proposed circuit. The functionality of the proposed circuits is verified through PSPICE simulations, using 0.25-[Formula: see text]m TSMC CMOS technology parameters.

Resistorless Realization of First‐Order Current Mode Universal Filter

Radio Science ◽  
2020 ◽  
Vol 55 (1) ◽  
Author(s):  
B. Chaturvedi ◽  
J. Mohan ◽  
Jitender ◽  
A. Kumar
Keyword(s):  
Current Mode ◽  
Universal Filter ◽  
First Order

scholarly journals REALIZATION OF FIRST-ORDER CURRENT-MODE FILTERS WITH LOW NUMBER OF MOS TRANSISTORS

2013 ◽  
Vol 22 (01) ◽  
pp. 1250071 ◽  
Author(s):  
ERKAN YUCE ◽  
SHAHRAM MINAEI ◽  
NORBERT HERENCSAR ◽  
JAROSLAV KOTON
Keyword(s):  
Low Voltage ◽  
Current Mode ◽  
Low Noise ◽  
Mos Transistors ◽  
Pass Filter ◽  
First Order ◽  
Saturation Region ◽  
Low Pass ◽  
High Pass ◽  
Nmos Transistors

In this paper, a new current-mode (CM) circuit for realizing all of the first-order filter responses is suggested. The proposed configuration contains low number of components, only two NMOS transistors both operating in saturation region, two capacitors and two resistors. Major advantages of the presented circuit are low voltage, low noise and high linearity. The proposed filter circuit can simultaneously provide both inverting and non-inverting first-order low-pass, high-pass and all-pass filter responses. Computer simulation results achieved through SPICE tool and experimental results are given as examples to demonstrate performance and effectiveness of the proposed topology.

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