Patent ID: 7076232
Filing Date: 2006-07-11
Classification: H03G,H04B

Abstract:
1. A receiver, comprising: an input port for receiving a RF wireless signal; down conversion circuitry coupled to receive the RF signal from the input port and producing a down converted baseband frequency signal; amplification circuitry coupled to receive the down converted baseband frequency signal and any DC signals introduced by the down conversion circuitry, the amplification circuitry for amplifying the received down converted baseband frequency signal; and a voltage integrator for charging a capacitor with a voltage that matches any DC signals introduced by the down conversion circuitry, the voltage integrator coupled to produce a charge having a DC voltage value that is opposite in polarity to the DC signals introduced by the down conversion circuitry to the input of the amplification circuitry; a MOSFET configured to operate as a resistor whenever a bias voltage is applied to a gate of the MOSFET, wherein the MOSFET is coupled between an input port of the voltage integrator and an output port of the amplification circuitry; and logic circuitry coupled to produce the bias voltage to the gate of the MOSFET to selectively charge the capacitor.