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Voltage differencing gain amplifier (VDGA) and its application

2013 13th International Symposium on Communications and Information Technologies (ISCIT), 2013
A circuit realization of the voltage differencing gain amplifier (VDGA) using only tunable transconductance cells is described in this paper. The newly defined element is conceptually a combination of the voltage differencing unit and the current-controlled voltage amplifier.
Jetsdaporn Satansup, Worapong Tangsrirat
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Sinusoidal quadrature oscillator using voltage differencing gain amplifiers (VDGAs)

2015 7th International Conference on Information Technology and Electrical Engineering (ICITEE), 2015
An alternative topology of voltage-mode sinusoidal quadrature oscillator based on VDGA (voltage differencing gain amplifier) is proposed. The proposed quadrature oscillator consisting of two VDGAs and two grounded capacitors with the absence of the external passive resistors can generate two sinusoidal output voltages with 90° phase difference.
Orapin Channumsin, Worapong Tangsrirat
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