JPS5779728A - Pulse width demodulating circuit - Google Patents

Pulse width demodulating circuit

Info

Publication number
JPS5779728A
JPS5779728A JP15534480A JP15534480A JPS5779728A JP S5779728 A JPS5779728 A JP S5779728A JP 15534480 A JP15534480 A JP 15534480A JP 15534480 A JP15534480 A JP 15534480A JP S5779728 A JPS5779728 A JP S5779728A
Authority
JP
Japan
Prior art keywords
current
increased
trq1
potential
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.)
Granted
Application number
JP15534480A
Other languages
Japanese (ja)
Other versions
JPH0132688B2 (en
Inventor
Eiichi Matsumura
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 JP15534480A priority Critical patent/JPS5779728A/en
Publication of JPS5779728A publication Critical patent/JPS5779728A/en
Publication of JPH0132688B2 publication Critical patent/JPH0132688B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/08—Demodulating pulses which have been modulated with a continuously-variable signal of duration- or width-mudulated pulses or of duty-cycle modulated pulses

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To obtain a pulse width demodulation suitable for circuit integration with less external components, by picking up positive and negative input signals as currents and also picking up one of excessive or deficient current which is a difference compared with a constant current. CONSTITUTION:When a positive signal is applied to an input terminal (a), a current of a transistor Q3(TR) increases and the current of a TRQ1 also increases. When the current of the TRQ1 is greater than a current set with a constant current I2, the collector potential of the TRQ1 is increased, a bias is applied to the base of a TRQ5 through a diode D4 and the potential at an output terminal (b) is increased. Inversely, when a negative signal is applied to the input terminal (a), the current of the TRQ3 is reduced but the current of a TRQ4 is increased, and when the current of a TRQ2 is greater than the current set at a constant current circuit I3, the collector potential of the TRQ2 is increased and the potential at the output terminal (b) is increased.
JP15534480A 1980-11-05 1980-11-05 Pulse width demodulating circuit Granted JPS5779728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15534480A JPS5779728A (en) 1980-11-05 1980-11-05 Pulse width demodulating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15534480A JPS5779728A (en) 1980-11-05 1980-11-05 Pulse width demodulating circuit

Publications (2)

Publication Number Publication Date
JPS5779728A true JPS5779728A (en) 1982-05-19
JPH0132688B2 JPH0132688B2 (en) 1989-07-10

Family

ID=15603832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15534480A Granted JPS5779728A (en) 1980-11-05 1980-11-05 Pulse width demodulating circuit

Country Status (1)

Country Link
JP (1) JPS5779728A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4870464A (en) * 1971-12-23 1973-09-25
JPS4918022A (en) * 1972-06-09 1974-02-18
JPS5019155A (en) * 1973-06-21 1975-02-28

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4870464A (en) * 1971-12-23 1973-09-25
JPS4918022A (en) * 1972-06-09 1974-02-18
JPS5019155A (en) * 1973-06-21 1975-02-28

Also Published As

Publication number Publication date
JPH0132688B2 (en) 1989-07-10

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