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Folding amplifiers are the key building blocks of folding flash analog to digital converters (ADC). Although, there are many folding amplifiers found in the literature, their transfer characteristics are either sinusoidal or triangular which causes digitization error and needs corrective measurements in folding-amplifier based ADCs. In this work, a new CMOS current-mode folding amplifier with saw-tooth...
We describe a CMOS class AB Voltage Feedback Current Operational Amplifier (VFCOA) offering both tunable gain (from 0 dB to 24 dB) and bandwidth (from 1 MHz to 3MHz). The implementation is based on class AB second generation current conveyors and exploits an electronically tunable transistorized feedback network. The solution was fabricated in 0.5-μm technology, the die area was 0.127 mm2 and measurement...
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