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Filter circuit feeds bias voltage to operational transconductance amplifier input and connects selected capacitor to operational transconductance amplifier output to set corner frequency
Filter circuit feeds bias voltage to operational transconductance amplifier input and connects selected capacitor to operational transconductance amplifier output to set corner frequency
The filter circuit has a filter contg. an operational transconductance amplifier (11,12) and an automatic corner frequency setting unit (200), whereby a bias voltage output parameter of the automatic setting unit is fed into a bias voltage connection of the operational transconductance amplifier and a capacitor is selected from a number of different capacitors (C11...C2m) as the capacitor for connection to the operational transconductance amplifier output to change the frequency setting range of the automatic setting unit.
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