JPS5720021A - Complementary mos transistor oscillating circuit - Google Patents

Complementary mos transistor oscillating circuit

Info

Publication number
JPS5720021A
JPS5720021A JP9447580A JP9447580A JPS5720021A JP S5720021 A JPS5720021 A JP S5720021A JP 9447580 A JP9447580 A JP 9447580A JP 9447580 A JP9447580 A JP 9447580A JP S5720021 A JPS5720021 A JP S5720021A
Authority
JP
Japan
Prior art keywords
voltage
output
low level
mos transistor
inverted
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
JP9447580A
Other languages
Japanese (ja)
Inventor
Eiji Masuda
Yasuo Kawahara
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 JP9447580A priority Critical patent/JPS5720021A/en
Publication of JPS5720021A publication Critical patent/JPS5720021A/en
Pending 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
    • H03K3/353—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of field-effect transistors with internal or external positive feedback
    • H03K3/354—Astable circuits

Abstract

PURPOSE:To set oscillation frequencies of respective circuit to the same constant value all the time, by employing the circuit constitution where oscillation frequencies do not relate with a power voltage. CONSTITUTION:Reference voltages VL and VH of reference voltage generating circuits 1 and 2 are so set that VL>VH. Right after a power source is turned on, a voltage VA at point A is lower than the VL lower than the VH, so the output signals of voltage comparing circuits 3 and 4 are at a high and a low level respectively. Then, an FF7 composed of a C-MOSFET is reset and its output signal is at a low level. This low-level signal is inverted to a high level by an inverter consisting of C-MOSFETs 9 and 10, and the voltage VA rises gradually toward a voltage V. At the timing where VH>VA>VL, the output of the FF7 never changes and when VA> VH, the output of the inverter 8 is inverted to a low level. Therefore, the voltage VA drops gradually toward a 0. From this point in time, the FF7 is set and reset repeatedly and a signal OSC at an NOR gate 6 side has a prescribed frequency. This period, however, does not relate to the power voltage.
JP9447580A 1980-07-10 1980-07-10 Complementary mos transistor oscillating circuit Pending JPS5720021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9447580A JPS5720021A (en) 1980-07-10 1980-07-10 Complementary mos transistor oscillating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9447580A JPS5720021A (en) 1980-07-10 1980-07-10 Complementary mos transistor oscillating circuit

Publications (1)

Publication Number Publication Date
JPS5720021A true JPS5720021A (en) 1982-02-02

Family

ID=14111295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9447580A Pending JPS5720021A (en) 1980-07-10 1980-07-10 Complementary mos transistor oscillating circuit

Country Status (1)

Country Link
JP (1) JPS5720021A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61266077A (en) * 1985-05-17 1986-11-25 Matsushita Electric Ind Co Ltd Voltage/frequency converter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5671326A (en) * 1979-11-15 1981-06-13 Matsushita Electric Works Ltd Cmos oscillating circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5671326A (en) * 1979-11-15 1981-06-13 Matsushita Electric Works Ltd Cmos oscillating circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61266077A (en) * 1985-05-17 1986-11-25 Matsushita Electric Ind Co Ltd Voltage/frequency converter

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