Circuit for measuring output powers of channels and stabilizing

Details Circuit for measuring output powers of channels and stabilizing Circuit for measuring output powers of channels and stabilizing

1996-12-05

1998-09-22

Urban, Edward F.

Telecommunications

Transmitter

With feedback of modulated output signal

455119, 455115, 455423, H04B 104

Patent

active

058129413

ABSTRACT:
A circuit for measuring output powers of channels and stabilizing RF output in a system using a linear power amplifier, includes a channel portion in which each of channels is made up with an RF control board and frequency increasing board; a base station output portion for combining and outputting the respective channel signals via an antenna; and an output stabilizing portion for mixing the RF output signal of the base station output portion with a selected second local signal among the second local signals by the frequency increasing boards to make a low intermediate frequency, filtering it, and converting it into a direct current, and comparing the current with the output of a base station so as to control a selection channel frequency of channel portion and stabilize the output, whereby the variation of output power possibly occurring by an RF stage and the output power of the base station are stabilized.

REFERENCES:
patent: 4517526 (1985-05-01), Di Cicco
patent: 5507015 (1996-04-01), Karczewski et al.
patent: 5530920 (1996-06-01), Takeda

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