Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Patent
1998-06-24
2000-12-19
Hunter, Daniel S.
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
455 91, 455 95, 455115, 455126, H04Q 720
Patent
active
061637092
ABSTRACT:
A transmitter for a cellular phone comprising an antenna and being operable at a first radio frequency band and a second radio frequency band is disclosed. In one embodiment, the transmitter includes a first power amplifier and a second power amplifier. The first power amplifier has a first input for a first signal at the first radio frequency band and a first output for an amplified first signal, the first output being connected to the antenna. The second power amplifier has a second input for a second signal at the second radio frequency band and a second output for an amplified second signal, the second output being connected to the antenna. The transmitter further comprises a single control module which is associated with the first and second outputs of the power amplifiers and comprises a logarithmic detector. The control module generates a control signal which is a function of an amplified signal and a reference signal in order to control the two power amplifiers.
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Chorey Christopher M.
Koullias Iconomos A.
Steigerwald Luke T.
Conexant Systems Inc.
Hunter Daniel S.
Woldetatios Yemane
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