CIRCUIT FOR COMPARING FIELD STRENGTH

摘要

A Received Signal Strength Indicator (RSSI) comparison circuit provides relatively error-free operation for radio communication systems using time division duplexing according to variations of received signals. The RSSI comparison circuit includes: a first comparator for receiving a received signal at a first terminal of a first comparator and for receiving a power supply voltage through first and second resistors at a second terminal thereof; a third resistor coupled between an output terminal of the first comparator and a source of the power supply voltage; a capacitor coupled between the output terminal of the first comparator and ground; a second comparator including a first terminal coupled to an output terminal of the first comparator and a second terminal for receiving the power supply voltage through fourth and fifth resistors; and a sixth resistor coupled between an output terminal of the second comparator and the source of the power supply voltage.