Amplifiers – Combined with automatic amplifier disabling switch means
Patent
1998-09-22
2000-05-09
Pascal, Robert
Amplifiers
Combined with automatic amplifier disabling switch means
330124R, H03F 368
Patent
active
060609494
ABSTRACT:
A power amplifier circuit arrangement including a power amplifier, and a bypass network for bypassing an RF-input signal around the power amplifier when excess gain and output power are not needed. When the bypass network is used, the power amplifier is turned off. A circulator connects the bypass network to the power amplifier output, thus removing the requirement of an output switch. The RF-input signal enters the circulator which routes the signal toward the output of the power amplifier. Because the amplifier is off, its output appears as a high impedance and reflects the signal back to the circulator. The circulator routes the reflected signal the signal output.
REFERENCES:
patent: 5423074 (1995-06-01), Dent
patent: 5661434 (1997-08-01), Brozovich et al.
patent: 5793253 (1998-08-01), Kumar et al.
patent: 5872481 (1999-02-01), Sevic et al.
patent: 5909643 (1999-06-01), Aihara
Camarillo Richard J.
Hunzeker Darin
Kaufman Ralph
Brown Charles D.
Nguyen Khanh Van
Pascal Robert
Qualcomm Incorporated
Wadsworth Philip R.
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