Fully Digitally Programmable Generalized Mixed Mode Universal Filter Configuration

2015 ◽  
Vol 35 (5) ◽  
pp. 1457-1480 ◽  
Author(s):  
Devesh Singh ◽  
Neelofer Afzal
Keyword(s):  
Mixed Mode ◽  
Universal Filter ◽  
Digitally Programmable ◽  
Filter Configuration

scholarly journals Reconfigurable Mixed Mode Universal Filter

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Neelofer Afzal ◽  
Devesh Singh
Keyword(s):  
Mixed Mode ◽  
Current Conveyors ◽  
Universal Filter ◽  
Current Feedback ◽  
Active Elements ◽  
Single Output ◽  
Programmable Filter ◽  
Digitally Programmable ◽  
Low Sensitivity ◽  
Filter Configuration

This paper presents a novel mixed mode universal filter configuration capable of working in voltage and transimpedance mode. The proposed single filter configuration can be reconfigured digitally to realize all the five second order filter functions (types) at single output port. Other salient features of proposed configuration include independently programmable filter parameters, full cascadability, and low sensitivity figure. However, all these features are provided at the cost of quite large number of active elements. It needs three digitally programmable current feedback amplifiers and three digitally programmable current conveyors. Use of six active elements is justified by introducing three additional reduced hardware mixed mode universal filter configurations and its comparison with reported filters.

Tunable mixed-mode OTA-C universal filter

2008 ◽  
Vol 58 (2) ◽  
pp. 135-141 ◽  
Author(s):  
Hua-Pin Chen ◽  
Yi-Zhen Liao ◽  
Wen-Ta Lee
Keyword(s):  
Mixed Mode ◽  
Universal Filter

MIXED MODE UNIVERSAL FILTER

2013 ◽  
Vol 22 (01) ◽  
pp. 1250064 ◽  
Author(s):  
NEETA PANDEY ◽  
SAJAL K. PAUL
Keyword(s):  
Mixed Mode ◽  
Cmos Technology ◽  
Output Impedance ◽  
Universal Filter ◽  
Output Current ◽  
Voltage Signal ◽  
Low Pass ◽  
Band Pass ◽  
Electronically Tunable ◽  
High Pass

The configuration with electronic tunable characteristics that can work in mixed mode may be useful from IC realization viewpoint and application adaptability. This paper proposes an electronically tunable mixed mode universal filter based on multiple output current controlled current conveyor (MOCCCII) and this single topology without any alteration can be used in all four modes i.e., voltage (VM), current (CM), transimpedance (TIM) and transadmittance (TAM). The architecture uses four MOCCCIIs and two grounded capacitors; and can realize universal filter functions — low pass (LP), band pass (BP), high pass (HP), notch (NF) and all pass (AP) for all four modes. Moreover the input impedance is high and output impedance is low for voltage signal and vice-versa for current signal, hence the proposed topology is suitable for cascading for all four modes. The workability of the proposed circuit has been verified via SPICE simulations using AMS 0.35 μm CMOS technology.

High-order DDCC-based general mixed-mode universal filter

2006 ◽  
Vol 153 (5) ◽  
pp. 511 ◽  
Author(s):  
C.-M. Chang ◽  
C.-N. Lee ◽  
C.-L. Hou ◽  
J.-W. Horng ◽  
C.-K. Tu
Keyword(s):  
Mixed Mode ◽  
High Order ◽  
Universal Filter

FULLY CASCADABLE MIXED-MODE UNIVERSAL FILTER BIQUAD USING DDCCS AND GROUNDED PASSIVE COMPONENTS

2011 ◽  
Vol 20 (04) ◽  
pp. 607-620 ◽  
Author(s):  
CHEN-NONG LEE
Keyword(s):  
Mixed Mode ◽  
Current Conveyors ◽  
Output Impedance ◽  
Universal Filter ◽  
Spice Simulation ◽  
Passive Components ◽  
Current Output ◽  
Current Voltage ◽  
Input Signals ◽  
Analytical Synthesis

A fully cascadable (i.e., low/high input impedance for current/voltage input signals and high/low output impedance for current/voltage output signals) mixed-mode (input and output signals can be voltage or current) universal filter biquad by using three differential difference current conveyors (DDCCs), three grounded resistors, and two grounded capacitors is presented in this paper. The proposed biquad can realize the inverting, non-inverting, and differential types universal filtering responses (lowpass, highpass, bandpass, notch, and allpass) from the voltage and current output terminals without changing the filter topology. The proposed circuit is suitable for cascading in all the four possible modes (i.e., voltage, current, transresistance, and transconductance modes). Moreover, the proposed mixed-mode biquad still enjoys (i) using only grounded passive components, (ii) no need of extra inverting and non-inverting amplifiers for special input signals, and (iii) low active and passive sensitivities. This paper also shows how analytical synthesis can be used to produce the proposed mixed-mode filter circuit. H-Spice simulation results confirm the theory.

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