| 摘要 |
A filter is formed by a transconductance amplifier (202) controlling the bias and active load currents of a capacitance amplification circuit. The capacitance amplification circuit includes a Miller integrator with a bias-setting circuit where the Miller integrator includes an amplifier (14), an on-chip capacitor (38), a resistor (214) and an active load current (Iout1) from a variable current source (94). As the other balanced portion of the capacitance multiplication circuit, the bias-setting circuit includes a bias current (Iout2) from a second variable current source (106), a second resistor (212), and a second amplifier (15). <IMAGE> |
