There is disclosed, for use in an RF amplifier, a biasing circuit for maintaining the quiescent current of an output power transistor at a selected bias level. The biasing circuit comprises a temperature sensor circuit for generating a temperature-sensitive control voltage that varies according to changes...http://www.google.es/patents/US6215358?utm_source=gb-gplus-sharePatente US6215358 - Temperature compensated bias network for a power amplifier and method of operation
Temperature compensated bias network for a power amplifier and method of ...