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)
SHINKE SATORU (JP)
SHOJI NORIO (JP)
Application Number:
PCT/JP2017/016371
Publication Date:
January 18, 2018
Filing Date:
April 25, 2017
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
H03K5/08; G05F3/24; H03G3/30; H03L7/089; H03L7/18
Foreign References:
JP2002246905A | 2002-08-30 | |||
JP2013048554A | 2013-03-07 | |||
JPH07262642A | 1995-10-13 | |||
JP2001285104A | 2001-10-12 | |||
JPH08279734A | 1996-10-22 | |||
JP2000151396A | 2000-05-30 | |||
JPS62158933U | 1987-10-08 |
Attorney, Agent or Firm:
MARUSHIMA, Toshikazu (JP)
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