A temperature stable bias circuit for a radio frequency (RF) power amplifier uses current deletion and current supplement techniques to maintain the bias, or reference current of the RF power amplifier at a stable level regardless of the temperature that the power amplifier is operating. When temperature...http://www.google.com/patents/US6424225?utm_source=gb-gplus-sharePatent US6424225 - Power amplifier circuit for providing constant bias current over a wide temperature range
