JPS54118154A - Signal amplitude compander featuring polygonal line characteristics - Google Patents

Signal amplitude compander featuring polygonal line characteristics

Info

Publication number
JPS54118154A
JPS54118154A JP2636678A JP2636678A JPS54118154A JP S54118154 A JPS54118154 A JP S54118154A JP 2636678 A JP2636678 A JP 2636678A JP 2636678 A JP2636678 A JP 2636678A JP S54118154 A JPS54118154 A JP S54118154A
Authority
JP
Japan
Prior art keywords
voltage
control voltage
featuring
input terminal
output
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.)
Granted
Application number
JP2636678A
Other languages
Japanese (ja)
Other versions
JPS6041885B2 (en
Inventor
Takeshi Toyoda
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
Nippon Electric Co Ltd
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, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP53026366A priority Critical patent/JPS6041885B2/en
Publication of JPS54118154A publication Critical patent/JPS54118154A/en
Publication of JPS6041885B2 publication Critical patent/JPS6041885B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To ensure easy and accurate setting of the changing points for the degree of compansion and expansion by switching the control voltage between the analog divider and multiplier in accordance with the scale of the reference voltage of the output voltage.
CONSTITUTION: AC signal Vi applied to input terminal 1 is applied to one input terminal of analog divider 6, and the control voltage amplified by operational amplifier A1 and A2 is applied to the other input terminal after obtaining the DC voltage of K|Vo| through detection of output voltage Vo via detector circuit 3 and low frequency filter circuit 4. Diode D1 conducts when K|Vo| is over reference voltage |Vr|, and D2 does not conduct with the control voltage set to K|Vo|. And D2 conducts when K|Vo|<|Vr| is satisfied and with the control voltage set to |Vr| respectively. Therefore, the input/output characteristics features the linear polygonal property centering on the point of K|Vo| = |Vr|. As a result, the intput/output property can be improved if the compander and the expander featuring the same structure.
COPYRIGHT: (C)1979,JPO&Japio
JP53026366A 1978-03-07 1978-03-07 Signal amplitude compandor with polygonal characteristics Expired JPS6041885B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53026366A JPS6041885B2 (en) 1978-03-07 1978-03-07 Signal amplitude compandor with polygonal characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53026366A JPS6041885B2 (en) 1978-03-07 1978-03-07 Signal amplitude compandor with polygonal characteristics

Publications (2)

Publication Number Publication Date
JPS54118154A true JPS54118154A (en) 1979-09-13
JPS6041885B2 JPS6041885B2 (en) 1985-09-19

Family

ID=12191491

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53026366A Expired JPS6041885B2 (en) 1978-03-07 1978-03-07 Signal amplitude compandor with polygonal characteristics

Country Status (1)

Country Link
JP (1) JPS6041885B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56149112A (en) * 1980-03-31 1981-11-18 Yokogawa Hewlett Packard Ltd Signal attenuator
JPS5848541A (en) * 1981-09-18 1983-03-22 Fujitsu Ltd Optical analog signal transmission system
JPS59164323U (en) * 1983-04-19 1984-11-05 日本コロムビア株式会社 Amplifier volume control circuit
JPH04344722A (en) * 1991-05-21 1992-12-01 Nec Corp Portable telephone system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56149112A (en) * 1980-03-31 1981-11-18 Yokogawa Hewlett Packard Ltd Signal attenuator
JPS5848541A (en) * 1981-09-18 1983-03-22 Fujitsu Ltd Optical analog signal transmission system
JPS6322695B2 (en) * 1981-09-18 1988-05-12 Fujitsu Ltd
JPS59164323U (en) * 1983-04-19 1984-11-05 日本コロムビア株式会社 Amplifier volume control circuit
JPH04344722A (en) * 1991-05-21 1992-12-01 Nec Corp Portable telephone system

Also Published As

Publication number Publication date
JPS6041885B2 (en) 1985-09-19

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