OPERATIONAL TRANSCONDUCTANCE AMPLIFIER HAVING WIDE TUNING RANGE

摘要

PURPOSE: To attain a programmable operational transcoductance amplifier to be driven by low power supply voltage without increasing noise. ;CONSTITUTION: The operational transconductance amplifier(OTA) 100 having a wide dynamic range includes a differential voltage/current converter 108 for converting input voltage into a current level. A pair of programmable folded cascodes 120, 124 are connected to the outputs of the converter 108 to make it possible to program the amplifier 100. Current sources 102, 104 are used for feeding output supply currents. A common mode feedback 106 maintains an output signal on the center of operation voltage at a substantially equal interval.;COPYRIGHT: (C)1995,JPO