Patent ID: 6240283
Filing Date: 2001-05-29
Classification: H04B

Abstract:
A receiver circuit comprising:a circuit input terminal for receiving an input signal;a circuit output terminal;an input amplifier having first and second input terminals, an output terminal and a gain control terminal, wherein the first input terminal of the input amplifier is coupled to the circuit input terminal and the second input terminal is coupled to a reference voltage terminal, and further wherein the input amplifier is configured to amplify a signal received at the input terminal of the input amplifier by a gain and output an amplified signal at the output terminal of the input amplifier, and further wherein the gain of the input amplifier is controlled by a gain control signal received at the gain control terminal of the input amplifier;a comparator having first and second input terminals and an output terminal, wherein the first input terminal is configured to receive a detect threshold voltage, the second input terminal is coupled to the output terminal of the input amplifier, and the output terminal of the comparator is coupled to the circuit output terminal;an analog delay circuit having input and output terminals, wherein the input terminal of the analog delay circuit is coupled to the second input terminal of the comparator;a switch having an input and output terminals and a switching control terminal, wherein the input terminal of the switch is coupled to the output terminal of the analog delay circuit and the switching control terminal is coupled to the output terminal of the comparator, and further wherein the switch is configured to close a path between the input and output terminals of the switch responsive to a first logic level of a switch control signal received at the switching control terminal; andan automatic gain control circuit having input and output terminals, wherein the input terminal of the automatic gain control circuit is coupled to the output terminal of the switch and the output terminal of the automatic gain control circuit is coupled to the gain control terminal of the input amplifier.