DC feed network for wideband RF power amplifier

Details DC feed network for wideband RF power amplifier DC feed network for wideband RF power amplifier

1991-06-20

1993-12-21

Pascal, Robert J.

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330306, H03F 100

Patent

active

052724506

ABSTRACT:
The frequency response of an RF power amplifier in a Cellular Phone Base station is improved by providing a shunt capacitor with the choke coil which interconnects a DC power source to the active device of the amplifier. The cutoff frequency of the bias network can be adjusted so that sum and difference frequencies of multiple-input signals are not attenuated by the feed network thereby permitting the sum and difference frequency signals to be shunted to ground. The linearity and bandwidth of the power amplifier is thus improved.

REFERENCES:
patent: 3054969 (1962-09-01), Harrison
patent: 4172237 (1979-10-01), Rankin
patent: 4232272 (1991-11-01), Fabri
patent: 4764736 (1988-08-01), Usui et al.
patent: 5036292 (1991-07-01), Hjelm et al.
Transistor Band-Pass Amplifiers, Radio Corporation of America RCA, Victor Division, Dec. 15th 1949.

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