Integrated circuit

Details Integrated circuit Integrated circuit

1996-07-30

1999-03-02

Chin, Tommy P.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 78, 455 79, 455 80, 455 81, 455269, 455281, 330277, 330130, 333 18, 333 171, 333 81, H04B 144, H04L 514, H03G 330

Patent

active

058783318

ABSTRACT:
An integrated circuit includes a single pole double throw switch including a transmitting and receiving port, a transmitting port, and a receiving port. A transmission switch is coupled between the transmitting port and the transmitting and receiving port. A reception switch is coupled between the receiving port and the transmitting and receiving port. The reception switch includes a field effect transistor having a gate, a drain and a source. A voltage generating circuit receives first and second power supply voltages. The first power supply voltage is greater than the second power supply voltage. The voltage generating circuit generates a third voltage lower than the second power supply voltage and applies the third voltage to the gate of the field effect transistor of the reception switch during transmission. As a result, the magnitude of the voltage difference between the gate and the source or the gate and the drain of the second field effect transistor is greater than the magnitude of the difference between the first and second power supply voltages. Accordingly, because of the increased electrical separation between the terminals of the field effect transistor, leakage current flowing to the receiving port during transmission is reduced.

REFERENCES:
patent: 4810911 (1989-03-01), Noguchi
patent: 5475875 (1995-12-01), Katsuyama et al.
patent: 5477532 (1995-12-01), Hoshigami et al.
patent: 5548239 (1996-08-01), Kohama et al.
patent: 5559471 (1996-09-01), Black
patent: 5589796 (1996-12-01), Alberth, Jr. et al.
patent: 5634200 (1997-05-01), Kitakubo et al.
patent: 5659885 (1997-08-01), McDonald et al.
patent: 5689817 (1997-11-01), Fok
patent: 5771470 (1998-06-01), Nimmo et al.
"3V Single Bias Operating SPDT T/R MMIC Switches for PHP Using the Symmetrical MESFETs"; Technical Report of the Institute of Electronics, Information and Communication Engineers, NO. MW93-157, Feb. 1994.
"A 3V MMIC Chip Set for 1.9GHz Mobile Communication Systems"; 1995 IEEE International Solid-State Circuits Conference, Feb. 16, 1995.

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