Low Passive Component-Count Current Follower-Based Current-Mode Second-Order Notch Filter

2006 ◽  
Author(s):  
T. Pukkalanun D. Prasertsom
Keyword(s):  
Notch Filter ◽  
Current Mode ◽  
Second Order ◽  
Passive Component ◽  
Current Follower

scholarly journals New Current-Mode Notch and Allpass Filters with Single Current Difference Amplifier

1996 ◽  
Vol 19 (1) ◽  
pp. 25-32 ◽  
Author(s):  
Muhammad Taher Abuelma'atti
Keyword(s):  
Notch Filter ◽  
Current Mode ◽  
Second Order ◽  
Experimental Results ◽  
Allpass Filters ◽  
Current Difference

A new configuration for realization of current-mode notch and allpass filters is presented. It can synthesize second-order notch and allpass filters using a single current difference (Norton) amplifier and at most eight passive RC one port elements. Experimental results obtained from a notch filter realization are presented.

MULTI-OUTPUT CURRENT FOLLOWER BASED CURRENT-MODE UNIVERSAL FILTER EMPLOYING ONLY GROUNDED CAPACITORS

2014 ◽  
Vol 23 (09) ◽  
pp. 1450123 ◽  
Author(s):  
HALIL ALPASLAN ◽  
ERKAN YUCE
Keyword(s):  
Output Voltage ◽  
Current Mode ◽  
Passive Component ◽  
Theoretical Knowledge ◽  
Universal Filter ◽  
Output Current ◽  
Matching Conditions ◽  
Current Follower ◽  
Component Matching ◽  
High Output

In this paper, a new two-input three-output second-order universal filter is proposed. Two multi-output voltage controlled current followers (MO-VCCFs) and two capacitors are used in the proposed filter. The proposed filter does not have external passive resistors. It has high output impedances yielding easy cascadability. It has the property of electronic tunability. It does not need any critical passive component matching conditions. Also, it is composed of only grounded capacitors; accordingly, it is suitable for integration. Theoretical knowledge is supported via SPICE simulations.

A New DVCC+ Based Second-Order Current-Mode Universal Filter Consisting of Only Grounded Capacitors

2017 ◽  
Vol 26 (09) ◽  
pp. 1750130 ◽  
Author(s):  
Ahmet Abaci ◽  
Erkan Yuce
Keyword(s):  
Notch Filter ◽  
Current Mode ◽  
Second Order ◽  
Pass Band ◽  
Current Conveyors ◽  
Universal Filter ◽  
Pass Filter ◽  
Low Pass ◽  
Band Pass ◽  
High Output Impedance

In this paper, a new second-order current-mode universal filter using only two plus-type differential voltage current conveyors, three resistors and two grounded capacitors is proposed. The proposed circuit with two identical inputs and three outputs can simultaneously provide second-order high output impedance low-pass, band-pass and notch filter responses. Also, it can realize high-pass and all-pass filter responses with interconnection of relevant output currents. It can be easily tuned electronically. It can be operated properly at high frequencies. A number of simulations based on SPICE program and an experimental test are achieved in order to demonstrate the performance of the proposed filter.

A HIGH INPUT IMPEDANCE VOLTAGE-MODE ALL-PASS/NOTCH FILTER USING A SINGLE VARIABLE GAIN CURRENT CONVEYOR

2008 ◽  
Vol 17 (05) ◽  
pp. 827-834 ◽  
Author(s):  
ERKAN YUCE ◽  
KIRAT PAL ◽  
SHAHRAM MINAEI
Keyword(s):  
Input Impedance ◽  
Notch Filter ◽  
Second Order ◽  
Passive Component ◽  
Single Variable ◽  
High Input ◽  
High Input Impedance ◽  
Pass Filter ◽  
Variable Gain ◽  
Voltage Mode

In this paper, a novel circuit for realizing voltage-mode first-order and second-order all-pass filter responses as well as second-order notch filter response depending on the passive component choice, is presented. This circuit has high input impedance; thus, it is easy to cascade the introduced filter with other voltage-mode topologies. Also, it uses a single Variable Gain Current Conveyer — VGCCII and only grounded capacitors. SPICE simulation results based on 0.35 μm TSMC CMOS technology parameters are given to confirm the theory.

A NEW CURRENT-MODE SQUARE-ROOT-DOMAIN GENERAL NOTCH FILTER

2013 ◽  
Vol 22 (01) ◽  
pp. 1250072 ◽  
Author(s):  
ALI KIRCAY ◽  
M. SERHAT KESERLIOGLU ◽  
UGUR CAM
Keyword(s):  
Process Parameters ◽  
Synthesis Method ◽  
Notch Filter ◽  
Current Mode ◽  
Second Order ◽  
Center Frequency ◽  
Cmos Process ◽  
Square Root ◽  
Mos Transistors ◽  
Level 3

In this paper, a new current-mode second-order square-root-domain general notch filter is proposed. The design is based on the state-space synthesis method with two subcircuit; square-root and squarer/divider circuits. In the circuit, the input and the output values, and dominant variables are all currents. Only MOS transistors and grounded capacitors are required to realize the filter circuit. Three cases of the second-order notch filter were obtained. The regular notch was obtained when ωn = ωp, the lowpass notch was obtained when ωn > ωp, and the highpass notch was obtained when ωn < ωp. The center frequency, and the notch frequency of the filter can be electronically tuned by changing external currents. Time and frequency domain simulations are performed using PSPICE program for the filter to verify the theory and to show the performance of it. For this purpose, the filter is simulated by using TSMC 0.35 μm Level 3 CMOS process parameters.

DX-MOCCII Based Fully Cascadable Second Order Current-Mode Universal Filter

2018 ◽  
Vol 27 (07) ◽  
pp. 1850113 ◽  
Author(s):  
Ashok Kumar ◽  
Sajal K. Paul
Keyword(s):  
Notch Filter ◽  
Current Mode ◽  
Second Order ◽  
Current Conveyors ◽  
Band Pass Filter ◽  
Universal Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Band Pass ◽  
Circuit Configuration

The paper presents a new second-order single input multiple output (SIMO) type current mode (CM) universal filter. The proposed circuit uses two dual-X second generation multi-output current conveyors (DX-MOCCII), two grounded capacitors and three grounded resistors. The circuit configuration realizes low-pass filter (LPF), high-pass filter (HPF), band-pass filter (BPF), notch filter (NF) and all-pass filter (APF) responses simultaneously at different output terminals. The new circuit enjoys the features of low input impedance and high output impedance, which is desirable and useful for cascadability in CM circuits. For realizing the universal filter responses, the proposed circuit configuration does not require matching constraint of passive components and both active and passive sensitivities are found low. In addition, the extension of the proposed circuit as a resistorless universal filter has also been presented. As an application of the proposed filter, inverting band pass output is connected to a negative unity gain current follower in a close loop to design voltage and CM multiphase sinusoidal oscillators (MSOs). Comparison of the proposed configuration with available literature is given. The PSPICE simulation of the filter and its application as MSO are performed to verify the agreement with the theoretical proposition.

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