Analytical synthesis of the digitally programmable voltage-mode OTA-C universal biquad

None of the recently reported voltage-mode versatile filters is digitally programmable like the application of easy addition of current-mode filtering signals to do the synthesis. And none of the recently reported analytical synthesis methods is used for the realization of a multifunction filter. Both the above two induced motivations of researches have been merged, developed, and solved in this brief on the voltage-mode OTA-C universal biquad filter which still achieves many advantages like the employments of all single-ended-input OTAs, all grounded capacitors, and the least number of active transistor and passive component counts in addition to have an controllable gain, a cascadable input terminal, and no need to impose component matchings