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. The transmitter comprises a first power amplifier and a second power amplifier, one of which is active at a time. The first power amplifier has an...http://www.google.de/patents/US6154664?utm_source=gb-gplus-sharePatent US6154664 - Dual band cellular phone with two power amplifiers and power control circuit therefore
Dual band cellular phone with two power amplifiers and power control circuit ...
