Invention Grant
- Patent Title: System and method of improving blocking immunity of radio frequency transceiver front end
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Application No.: US16793985Application Date: 2020-02-18
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Publication No.: US11196385B2Publication Date: 2021-12-07
- Inventor: Ruifeng Sun , Ricky Setiawan , Ben Wee-Guan Tan
- Applicant: Silicon Laboratories Inc.
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: Huffman Law Group, PC
- Agent Gary Stanford
- Main IPC: H03F1/02
- IPC: H03F1/02 ; H03F3/21 ; H03F3/193

Abstract:
A power amplifier for a radio frequency transceiver including a driver, a disable circuit, and a bias circuit. The driver includes a source node for receiving a drive voltage when enabled and includes an output node that is susceptible to strong blocker signals when disabled. The bias circuit includes first and second bias nodes for driving the voltage level of the source and output nodes, respectively, to suitable bias voltage levels to minimize impact of blocker signals. The disable circuit includes switch circuits to couple the driver to the bias circuit in the disable mode. The bias circuit may include at least one voltage source. The bias circuit may be coupled to a supply voltage and may include a voltage divider coupled between the source and output nodes. The bias circuit may include a source-follower circuit to isolate the bias voltages from variations of the supply voltage.
Public/Granted literature
- US20210257970A1 SYSTEM AND METHOD OF IMPROVING BLOCKING IMMUNITY OF RADIO FREQUENCY TRANSCEIVER FRONT END Public/Granted day:2021-08-19
Information query
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