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Patent Searching and Data


Title:
SWITCHING CIRCUIT, AUTOMATIC GAIN CONTROL CIRCUIT AND PHASE SYNCHRONIZATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2018/012083
Kind Code:
A1
Abstract:
The present invention reduces a leak current while reducing low-frequency noise in an AGC circuit provided with a transistor that shifts to an on state or an off state according to the level of a signal. A switching circuit is provided with a first bipolar transistor, a second bipolar transistor and a comparison unit. The second bipolar transistor is cascode-connected to the first bipolar transistor at a connection point, and a fixed bypass voltage that is not less than a threshold voltage is applied to a base thereof. The comparison unit compares an input signal and a predetermined reference signal, and outputs a pair of differential output signals indicating the result of the comparison to a base of the first bipolar transistor and the connection point.

Inventors:
NAGATA SHUN (JP)
SHINKE SATORU (JP)
SHOJI NORIO (JP)
Application Number:
PCT/JP2017/016371
Publication Date:
January 18, 2018
Filing Date:
April 25, 2017
Export Citation:
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Assignee:
SONY CORP (JP)
International Classes:
H03K5/08; G05F3/24; H03G3/30; H03L7/089; H03L7/18
Foreign References:
JP2002246905A2002-08-30
JP2013048554A2013-03-07
JPH07262642A1995-10-13
JP2001285104A2001-10-12
JPH08279734A1996-10-22
JP2000151396A2000-05-30
JPS62158933U1987-10-08
Attorney, Agent or Firm:
MARUSHIMA, Toshikazu (JP)
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