Electronically tunable multiple-input single-output voltage-mode multifunction filter employing simple CMOS OTAs

2010 ◽  
Author(s):  
Montree Kumngern ◽  
Usa Torteanchai ◽  
Kobchai Dejhan
Keyword(s):  
Output Voltage ◽  
Voltage Mode ◽  
Single Output ◽  
Multiple Input ◽  
Multifunction Filter ◽  
Electronically Tunable

scholarly journals Three-Input Single-Output Voltage-Mode Multifunction Filter with Electronic Controllability Based on Single Commercially Available IC

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Supachai Klungtong ◽  
Dusit Thanapatay ◽  
Winai Jaikla
Keyword(s):  
Output Voltage ◽  
Matching Condition ◽  
Passive Component ◽  
Voltage Mode ◽  
Single Output ◽  
Rlc Circuit ◽  
Low Pass ◽  
Multifunction Filter ◽  
Component Matching ◽  
Technology Corporation

This paper presents a second-order voltage-mode filter with three inputs and single-output voltage using single commercially available IC, one resistor, and two capacitors. The used commercially available IC, called LT1228, is manufactured by Linear Technology Corporation. The proposed filter is based on parallel RLC circuit. The filter provides five output filter responses, namely, band-pass (BP), band-reject (BR), low-pass (LP), high-pass (HP), and all-pass (AP) functions. The selection of each filter response can be done without the requirement of active and passive component matching condition. Furthermore, the natural frequency and quality factor are electronically controlled. Besides, the nonideal case is also investigated. The output voltage node exhibits low impedance. The experimental results can validate the theoretical analyses.

NOVEL VOLTAGE-MODE MULTIFUNCTION FILTER USING ONLY TWO DDCCs

2008 ◽  
Vol 17 (06) ◽  
pp. 1161-1172 ◽  
Author(s):  
HUA-PIN CHEN ◽  
KUO-HSIUNG WU
Keyword(s):  
Cmos Technology ◽  
The Other ◽  
Current Conveyors ◽  
Lowpass Filter ◽  
Analog Filter ◽  
Chip Area ◽  
Voltage Mode ◽  
Single Output ◽  
Multifunction Filter ◽  
Component Matching

A new voltage-mode biquad with four inputs and four outputs using only two differential difference current conveyors (DDCCs), two grounded capacitors, and two resistors is proposed. The proposed circuit can act as a multifunction voltage-mode filter with one or three inputs and four outputs and can perform simultaneous realization of voltage-mode notch, highpass, bandpass, and lowpass filter signals from the four output terminals, respectively, without any component choice conditions. On the other hand, it also can act as a universal voltage-mode filter with four inputs and a single output and can realize five generic voltage-mode filter signals from the same configuration without any component-matching conditions. Finally, to verify our architecture, we have designed this analog filter chip with TSMC 0.35 μm 2P4M CMOS technology. This chip operates to 1.125 MHz and consumes 30.95 mW. The chip area of the analog filter is about 0.822 mm2.

Five-inputs single-output voltage mode universal filter with high input and low output impedance using VDDDAs

Optik ◽  
2017 ◽  
Vol 128 ◽  
pp. 14-25 ◽  
Author(s):  
Surasak Sangyaem ◽  
Surapong Siripongdee ◽  
Winai Jaikla ◽  
Fabian Khateb
Keyword(s):  
Output Voltage ◽  
Output Impedance ◽  
Universal Filter ◽  
High Input ◽  
Voltage Mode ◽  
Single Output
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