JPS5526745A - Sound volume control circuit - Google Patents

Sound volume control circuit

Info

Publication number
JPS5526745A
JPS5526745A JP9965178A JP9965178A JPS5526745A JP S5526745 A JPS5526745 A JP S5526745A JP 9965178 A JP9965178 A JP 9965178A JP 9965178 A JP9965178 A JP 9965178A JP S5526745 A JPS5526745 A JP S5526745A
Authority
JP
Japan
Prior art keywords
sound
sound volume
pulse
volume
pulse width
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
JP9965178A
Other languages
Japanese (ja)
Inventor
Masaharu Murakami
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9965178A priority Critical patent/JPS5526745A/en
Publication of JPS5526745A publication Critical patent/JPS5526745A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE: To make it possible to decrease sound volume to zero by providing a reference pulse setting the minimum of sound volume and then by defeating a sound when the pulse width becomes below that of the reference pulse.
CONSTITUTION: When pulse widths TM and Tr of output signals (A) and (C) of monostable multivibrators FF11 and FF12 of the sound volume limiter circuit are set to TM>Tr, a normal sound is sent out and at this time, the sound volume can be varied by varying TM. Here, Tr is the pulse width of a minimum-volume reference pulse of a time constant determined by the internal resistance of FF12 and external capacitor C2. With TM<Tr, the state of the RSFF circuit formed of NAND gates 15 and 16 is inverted to close gate 17, so that the output signal of multivibrator 11 will not be outputted C. Namely, a sound is decreased down to zero completely with a sound output approximating zero although pulse width TM is a finite value.
COPYRIGHT: (C)1980,JPO&Japio
JP9965178A 1978-08-16 1978-08-16 Sound volume control circuit Pending JPS5526745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9965178A JPS5526745A (en) 1978-08-16 1978-08-16 Sound volume control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9965178A JPS5526745A (en) 1978-08-16 1978-08-16 Sound volume control circuit

Publications (1)

Publication Number Publication Date
JPS5526745A true JPS5526745A (en) 1980-02-26

Family

ID=14252951

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9965178A Pending JPS5526745A (en) 1978-08-16 1978-08-16 Sound volume control circuit

Country Status (1)

Country Link
JP (1) JPS5526745A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS575315U (en) * 1980-06-10 1982-01-12
JPS62177618A (en) * 1985-12-26 1987-08-04 アメリカン　テレフォン　アンド　テレグラフ　カムパニー Pressure sensitive light pen
JPS62280918A (en) * 1986-05-29 1987-12-05 Pentel Kk Signal input device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS575315U (en) * 1980-06-10 1982-01-12
JPS62177618A (en) * 1985-12-26 1987-08-04 アメリカン　テレフォン　アンド　テレグラフ　カムパニー Pressure sensitive light pen
JPS62280918A (en) * 1986-05-29 1987-12-05 Pentel Kk Signal input device

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