Invention Grant
- Patent Title: High frequency circuit and high frequency module
- Patent Title (中): 高频电路和高频模块
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Application No.: US13547431Application Date: 2012-07-12
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Publication No.: US08810317B2Publication Date: 2014-08-19
- Inventor: Ryo Kadoi , Norio Hayashi , Satoshi Shimizu , Akio Yamamoto
- Applicant: Ryo Kadoi , Norio Hayashi , Satoshi Shimizu , Akio Yamamoto
- Applicant Address: JP Kanagawa
- Assignee: Renesas Electronics Corporation
- Current Assignee: Renesas Electronics Corporation
- Current Assignee Address: JP Kanagawa
- Agency: Mattingly & Malur, PC
- Priority: JP2011-171642 20110805
- Main IPC: H03G3/30
- IPC: H03G3/30

Abstract:
A high frequency circuit and a high frequency module are provided, in which the accuracy of compensation operation is improved in compensating by digital control. The amplification gain of an amplification element of an amplifier unit is controlled by a bias current of a bias control unit. A process monitoring circuit of a calibration circuit includes a first and a second element characteristic detector and a voltage comparator. The detectors convert the current of replica elements into a first and a second detection voltage. The voltage comparator compares a first and a second detection voltage and supplies a comparison output signal to a search control unit. Responding to the comparison output signal of the comparator and a clock signal of a clock generating unit, the controller generates a multi-bit digital compensation value according to a predetermined search algorithm, and the bias control unit of the second detector is feedback-controlled.
Public/Granted literature
- US20130033327A1 HIGH FREQUENCY CIRCUIT AND HIGH FREQUENCY MODULE Public/Granted day:2013-02-07
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