JPS54120567A - Pulse generating circuit - Google Patents
Pulse generating circuitInfo
- Publication number
- JPS54120567A JPS54120567A JP2722078A JP2722078A JPS54120567A JP S54120567 A JPS54120567 A JP S54120567A JP 2722078 A JP2722078 A JP 2722078A JP 2722078 A JP2722078 A JP 2722078A JP S54120567 A JPS54120567 A JP S54120567A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- voltage supply
- output
- constant
- 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.)
- Granted
Links
Landscapes
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
PURPOSE:To make it possible to vary an oscillation frequency and a duty ratio freely corresponding to an input signal, by providing a charge-discharge circuit composed of a capacitor discharged by a current whose value varies corresponding to the input signal. CONSTITUTION:The pulse generating circuit consists of input circuit 1, charge- discharge circuit 2 composed of a constant-voltage supply, variable current supplies whose current values vary according to the output of circuit 1, and a capacitor charged or discharged by output currents of two current supplies, reference voltage generating circuit 3 composed of a constant-voltage supply with its value fixed and a variable voltage supply whose value varies according to the output signal of circuit 1, comparator 4, buffer circuit 5, and change-over circuit 6 (the output voltage of the constant voltage supply is supplied to comparator 4 through the changeover of circuit 3 so that when the output signal of comparator 4 is ''1'', the capacity of circuit 2 is charged by the constant voltage supply). Its frequency characteristics, shown by solid lines (a) to (d) and its duty-ratio characteristics, shown by one-dot chain lines, can be varied freely according to the input signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53027220A JPS5945289B2 (en) | 1978-03-10 | 1978-03-10 | Pulse generation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53027220A JPS5945289B2 (en) | 1978-03-10 | 1978-03-10 | Pulse generation circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54120567A true JPS54120567A (en) | 1979-09-19 |
JPS5945289B2 JPS5945289B2 (en) | 1984-11-05 |
Family
ID=12215008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53027220A Expired JPS5945289B2 (en) | 1978-03-10 | 1978-03-10 | Pulse generation circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5945289B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63191404A (en) * | 1987-02-03 | 1988-08-08 | Fujitsu Ltd | Clock generator |
JPH02224517A (en) * | 1989-02-27 | 1990-09-06 | Yokogawa Electric Corp | Astable ocsillating circuit and switching power supply |
-
1978
- 1978-03-10 JP JP53027220A patent/JPS5945289B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63191404A (en) * | 1987-02-03 | 1988-08-08 | Fujitsu Ltd | Clock generator |
JPH02224517A (en) * | 1989-02-27 | 1990-09-06 | Yokogawa Electric Corp | Astable ocsillating circuit and switching power supply |
Also Published As
Publication number | Publication date |
---|---|
JPS5945289B2 (en) | 1984-11-05 |
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