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JPS55104127A - Semiconductor integrated circuit generating pulse width modulated signal - Google Patents

Semiconductor integrated circuit generating pulse width modulated signal

Info

Publication number
JPS55104127A
JPS55104127A JP1177479A JP1177479A JPS55104127A JP S55104127 A JPS55104127 A JP S55104127A JP 1177479 A JP1177479 A JP 1177479A JP 1177479 A JP1177479 A JP 1177479A JP S55104127 A JPS55104127 A JP S55104127A
Authority
JP
Japan
Prior art keywords
signal
pulse width
width modulated
modulated signal
comparator
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
JP1177479A
Other languages
Japanese (ja)
Inventor
Mitsuo Osawa
Akio Koizumi
Hiroshi Nakazawa
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP1177479A priority Critical patent/JPS55104127A/en
Publication of JPS55104127A publication Critical patent/JPS55104127A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE: To make use of the circuit as a part of various circuits, by providing the input and output terminals leading to the operational amplifier, comparator connecting the output to one input terminal and the drive amplifier inputting the output of comparator.
CONSTITUTION: The rectangular carrier wave signal S1, low frequency signal S2 and pulse width modulated signal S3 are fed to the operational amplifier 2 of the semiconductor integrated circuit 1 of pulse width modulated signal generation, and integrated into saw tooth wave signal. This signal is compared with the reference potential (zero potential) at the comparator 3 and pulse width modulated drive signal S4 is obtained at the terminal pin P5. Thus, the transistors Q1, Q2 of the D-type amplifier 11 are alternately turned on. The pulse width modulated signal amplified with the D-type amplifier 11 is fed to the low pass filter 12, allowing to obtain the low frequency signal S2 for original modulation signal.
COPYRIGHT: (C)1980,JPO&Japio
JP1177479A 1979-02-02 1979-02-02 Semiconductor integrated circuit generating pulse width modulated signal Pending JPS55104127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1177479A JPS55104127A (en) 1979-02-02 1979-02-02 Semiconductor integrated circuit generating pulse width modulated signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1177479A JPS55104127A (en) 1979-02-02 1979-02-02 Semiconductor integrated circuit generating pulse width modulated signal

Publications (1)

Publication Number Publication Date
JPS55104127A true JPS55104127A (en) 1980-08-09

Family

ID=11787305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1177479A Pending JPS55104127A (en) 1979-02-02 1979-02-02 Semiconductor integrated circuit generating pulse width modulated signal

Country Status (1)

Country Link
JP (1) JPS55104127A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457435A (en) * 1994-03-25 1995-10-10 Caterpillar Inc. Pulse width modulated driver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457435A (en) * 1994-03-25 1995-10-10 Caterpillar Inc. Pulse width modulated driver

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