JPS5541023A - Photo oscillation circuit - Google Patents

Photo oscillation circuit

Info

Publication number
JPS5541023A
JPS5541023A JP11388678A JP11388678A JPS5541023A JP S5541023 A JPS5541023 A JP S5541023A JP 11388678 A JP11388678 A JP 11388678A JP 11388678 A JP11388678 A JP 11388678A JP S5541023 A JPS5541023 A JP S5541023A
Authority
JP
Japan
Prior art keywords
photo
diode
power supply
base
negative electrode
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
JP11388678A
Other languages
Japanese (ja)
Other versions
JPS5950133B2 (en
Inventor
Yukio Iitaka
Toshiro Abe
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP11388678A priority Critical patent/JPS5950133B2/en
Publication of JPS5541023A publication Critical patent/JPS5541023A/en
Publication of JPS5950133B2 publication Critical patent/JPS5950133B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/42—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled

Landscapes

  • Electronic Switches (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

PURPOSE:To enable to change the oscillation frequency by the intensity of light, by connecting a Zener diode between the negative electrode of power supply for the photo oscillation circuit consisting of NPN transistor Tr, PNP Tr and photo diode and the base of NPNTr. CONSTITUTION:When light is emitted to the photo diode 4, current flows, and when the voltage drop of the resistor 8 conneced between the emitter of NPNTr1 and the power supply negative electrode is greater than the Zener voltage of the Zener diode 5 connected between the base of Tr1 and the negative electrode of power supply, the collector current of Tr1 is interrupted. Thus, the voltage drop of the resistor 7 is avoided and the base potential of PNPTr2 is increased to the same potential as the positive electrode of power supply. The charge up voltage of the capacitor C6 lowers the emitter potential of Tr2 than the base potential to avoid Tr2 from being turned ON. When C6 finishes for discharge by the photo current of the diode 4, Tr2 turns on and Tr1 also turns on. The oscillating state is made by repeating this ON-OFF phenomenon. When the photo current of the diode 4 increases, the discharge time of C6 is shortened to change the oscillation frequency by the intensity of light.
JP11388678A 1978-09-15 1978-09-15 optical oscillation circuit Expired JPS5950133B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11388678A JPS5950133B2 (en) 1978-09-15 1978-09-15 optical oscillation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11388678A JPS5950133B2 (en) 1978-09-15 1978-09-15 optical oscillation circuit

Publications (2)

Publication Number Publication Date
JPS5541023A true JPS5541023A (en) 1980-03-22
JPS5950133B2 JPS5950133B2 (en) 1984-12-06

Family

ID=14623583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11388678A Expired JPS5950133B2 (en) 1978-09-15 1978-09-15 optical oscillation circuit

Country Status (1)

Country Link
JP (1) JPS5950133B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796440A (en) * 1987-01-28 1989-01-10 Sanyei Corp. Ice cream maker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6148409U (en) * 1984-08-31 1986-04-01

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796440A (en) * 1987-01-28 1989-01-10 Sanyei Corp. Ice cream maker

Also Published As

Publication number Publication date
JPS5950133B2 (en) 1984-12-06

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