| 摘要 |
A method and circuit for compensation control of offset voltages of a radio receiving circuit integrated in a circuit module that can be used in receiver and transceiver chips for portable mobile radio transceivers, for example in GSM or PCN/PCS systems. In the course of offset voltage compensated in the baseband of a radio receiver, the charge state of a capacitor, which is switched on in a sample-and-hold circuit by predetermined, constant control pulses is evaluated on-chip. The evaluation result is used to match the charging current of a sample operational amplifier to the respective charge state of the capacitor, thereby achieving a minimal compensation time with stable regulation.
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