首页>
外国专利>
Current controlled biasing for current-steering based RF variable gain amplifiers
Current controlled biasing for current-steering based RF variable gain amplifiers
展开▼
机译:基于电流控制的RF可变增益放大器的电流控制偏置
展开▼
页面导航
摘要
著录项
相似文献
摘要
An adaptive current control circuit for reduced power consumption and minimized gain shift in a variable gain amplifier. An automatic gain control circuit provides gain control voltages in response to a gain control signal. The gain control voltages are used by the variable gain amplifier to set the gain of the output signal for wireless transmit operations. The adaptive current control circuit receives the same gain control voltages for reducing current to the variable gain amplifier during low gain operation, while providing higher currents during high gain operation. The current that is provided is a hybrid mix of proportional to absolute temperature (PTAT) current and complementary to absolute temperature (CTAT) current for minimizing temperature effects on the gain. The ratio of PTAT current and CTAT current is adjustable for specific temperature ranges to further minimize temperature effects on the gain.
展开▼