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JPS5787619A - Cr oscillating circuit - Google Patents

Cr oscillating circuit

Info

Publication number
JPS5787619A
JPS5787619A JP55164444A JP16444480A JPS5787619A JP S5787619 A JPS5787619 A JP S5787619A JP 55164444 A JP55164444 A JP 55164444A JP 16444480 A JP16444480 A JP 16444480A JP S5787619 A JPS5787619 A JP S5787619A
Authority
JP
Japan
Prior art keywords
resistor
polysilicon
node
current limit
resistance value
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
JP55164444A
Other languages
Japanese (ja)
Inventor
Seiichi Shibazaki
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.)
Ricoh Elemex Corp
Original Assignee
Ricoh Elemex 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 Ricoh Elemex Corp filed Critical Ricoh Elemex Corp
Priority to JP55164444A priority Critical patent/JPS5787619A/en
Publication of JPS5787619A publication Critical patent/JPS5787619A/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
    • H03K3/027—Generators characterised by the type of circuit or by the means used for producing pulses by the use of logic circuits, with internal or external positive feedback
    • H03K3/03—Astable circuits

Abstract

PURPOSE:To reduce number of components and to make stable the oscillating frequency, by constituting a current limit resistor with polysilicon, in a circuit consisting of CMOS inverters. CONSTITUTION:To suppress the voltage fluctuation at a node 9 connected with a resistor 5 and a capacitor 4 within a rated value, a current limit resistor 12 having a resistance value >=2 times the resistor 5 is provided between the node 9 and an inverter 1 for the protection of inverters. The resistor 12 is provided on a semiconductor substrate with polysilicon to avoid the voltage fluctuation. Specified resistors can be manufactured because the resistance value of polysilicon can be controlled with doping amount of impurity.
JP55164444A 1980-11-20 1980-11-20 Cr oscillating circuit Pending JPS5787619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55164444A JPS5787619A (en) 1980-11-20 1980-11-20 Cr oscillating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55164444A JPS5787619A (en) 1980-11-20 1980-11-20 Cr oscillating circuit

Publications (1)

Publication Number Publication Date
JPS5787619A true JPS5787619A (en) 1982-06-01

Family

ID=15793280

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55164444A Pending JPS5787619A (en) 1980-11-20 1980-11-20 Cr oscillating circuit

Country Status (1)

Country Link
JP (1) JPS5787619A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02162820A (en) * 1988-12-15 1990-06-22 Matsushita Electric Ind Co Ltd Oscillation circuit
WO2007023402A3 (en) * 2005-08-24 2007-05-31 Koninkl Philips Electronics Nv Integrated rc oscillator with high frequency stability, notably for an integrated switched-mode power supply
US7271670B2 (en) 2004-11-10 2007-09-18 Matsushita Electric Industrial Co., Ltd. CR oscillation circuit
JP2013123164A (en) * 2011-12-12 2013-06-20 Lapis Semiconductor Co Ltd Cr oscillation circuit and semiconductor integrated device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02162820A (en) * 1988-12-15 1990-06-22 Matsushita Electric Ind Co Ltd Oscillation circuit
US7271670B2 (en) 2004-11-10 2007-09-18 Matsushita Electric Industrial Co., Ltd. CR oscillation circuit
WO2007023402A3 (en) * 2005-08-24 2007-05-31 Koninkl Philips Electronics Nv Integrated rc oscillator with high frequency stability, notably for an integrated switched-mode power supply
US7889016B2 (en) 2005-08-24 2011-02-15 St-Ericsson Sa Integrated RC oscillator with high frequency stability, notably for an integrated switched-mode power supply
JP2013123164A (en) * 2011-12-12 2013-06-20 Lapis Semiconductor Co Ltd Cr oscillation circuit and semiconductor integrated device

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