Invention Application
- Patent Title: ENVELOPE TRACKING POWER SUPPLY VOLTAGE DYNAMIC RANGE REDUCTION
- Patent Title (中): 包络跟踪电源电压动态范围减小
-
Application No.: PCT/US2014028178Application Date: 2014-03-14
-
Publication No.: WO2014152903A3Publication Date: 2014-11-20
- Inventor: CHIRON JEAN-FREDERIC , KHLAT NADIM
- Applicant: RF MICRO DEVICES INC
- Assignee: RF MICRO DEVICES INC
- Current Assignee: RF MICRO DEVICES INC
- Priority: US201361783934 2013-03-14
- Main IPC: H03F1/02
- IPC: H03F1/02 ; H03F3/189
Abstract:
A radio frequency (RF) system includes an RF power amplifier (PA), which uses an envelope tracking power supply voltage to provide an RF transmit signal, which has an RF envelope; and further includes an envelope tracking power supply, which provides the envelope tracking power supply voltage based on a setpoint. RF transceiver circuitry, which includes envelope control circuitry and an RF modulator is disclosed. The envelope control circuitry provides the setpoint, such that the envelope tracking power supply voltage is clipped to form clipped regions and substantially tracks the RF envelope between the clipped regions, wherein a dynamic range of the envelope tracking power supply voltage is limited. The RF modulator provides an RF input signal to the RF PA, which receives and amplifies the RF input signal to provide the RF transmit signal.
Information query
IPC分类: