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JPS6432511A - Agc amplifier circuit - Google Patents

Agc amplifier circuit

Info

Publication number
JPS6432511A
JPS6432511A JP18983787A JP18983787A JPS6432511A JP S6432511 A JPS6432511 A JP S6432511A JP 18983787 A JP18983787 A JP 18983787A JP 18983787 A JP18983787 A JP 18983787A JP S6432511 A JPS6432511 A JP S6432511A
Authority
JP
Japan
Prior art keywords
level
amplifier
attenuator
input signal
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP18983787A
Other languages
Japanese (ja)
Inventor
Akira Hamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP18983787A priority Critical patent/JPS6432511A/en
Publication of JPS6432511A publication Critical patent/JPS6432511A/en
Pending legal-status Critical Current

Links

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  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To prevent the increase in nonlinear distortion even when an input signal level gets higher by connecting a stage having a variable attenuator in cascade to an amplifier and connecting an attenuator of the input stage and between stages in response to the level of the input signal. CONSTITUTION:A signal given from a terminal A is outputted from a terminal B via variable attenuators 1, 3, 5 connected in cascade and amplifiers 2, 4, 6. The output level is detected by a detector 7 and an error voltage with a reference voltage set by an output level adjusting device 9 is amplified by an amplifier 8 and a drive circuit 10 controls the attenuators 3, 5 to keep the output level constant. This is the case with an input signal level lower than the level set by an AGC switching point adjusting device 12 and when the level is higher, a drive circuit 11 is activated to use the attenuator 1 to suppress the input level of the amplifier 2 to a permissible maximum level or below thereby improving the nonlinear distortion characteristic.
JP18983787A 1987-07-28 1987-07-28 Agc amplifier circuit Pending JPS6432511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18983787A JPS6432511A (en) 1987-07-28 1987-07-28 Agc amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18983787A JPS6432511A (en) 1987-07-28 1987-07-28 Agc amplifier circuit

Publications (1)

Publication Number Publication Date
JPS6432511A true JPS6432511A (en) 1989-02-02

Family

ID=16248037

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18983787A Pending JPS6432511A (en) 1987-07-28 1987-07-28 Agc amplifier circuit

Country Status (1)

Country Link
JP (1) JPS6432511A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04248708A (en) * 1991-02-05 1992-09-04 Fukushima Nippon Denki Kk Amplifier with output variable linearizer
US6618905B2 (en) 2001-01-24 2003-09-16 Honda Giken Kogyo Kabushiki Kaisha Handle holder for bush cutting machine
JP2006067369A (en) * 2004-08-27 2006-03-09 Maspro Denkoh Corp Amplifier for television reception
JP2006129292A (en) * 2004-10-29 2006-05-18 Maspro Denkoh Corp Amplifier for television reception
JP2008177897A (en) * 2007-01-19 2008-07-31 Matsushita Electric Ind Co Ltd Gain control filter device, gain control complex filter device, and reception device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04248708A (en) * 1991-02-05 1992-09-04 Fukushima Nippon Denki Kk Amplifier with output variable linearizer
US6618905B2 (en) 2001-01-24 2003-09-16 Honda Giken Kogyo Kabushiki Kaisha Handle holder for bush cutting machine
JP2006067369A (en) * 2004-08-27 2006-03-09 Maspro Denkoh Corp Amplifier for television reception
JP2006129292A (en) * 2004-10-29 2006-05-18 Maspro Denkoh Corp Amplifier for television reception
JP2008177897A (en) * 2007-01-19 2008-07-31 Matsushita Electric Ind Co Ltd Gain control filter device, gain control complex filter device, and reception device

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