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US 4,223,280 AGranted
Relaxation oscillator including an SCR and having switch means for interrupting current flow therethrough
AssigneeRCA Corporation
InventorAdel A. A. Ahmed
Life of this patent
Estimating the term…
Abstract
Within a relaxation oscillator of the type having a capacitor that is recurrently being charged from a current source and discharged through a silicon controlled rectifier upon reaching a voltage threshold thereacross, a switch is disposed to interrupt current flow through the SCR in response to the capacitor being discharged to a predetermined level.
Claims13
In a relaxation oscillator of the type wherein
- a capacitor has a first plate connected to a reference potential and has a second plate connected to a voltage rail by a current source and;
- the main conduction path of an SCR is connected across the capacitor, which capacitor is recurrently charged by the current source and then discharged through the SCR upon the voltage at the second plate of the capacitor reaching a threshold level, the improvement comprising:
- switch means serially connected with the main conduction path of the SCR for interrupting current flow therethrough responsive to the voltage at the second plate of the capacitor being discharged to a predetermined level during each oscillation cycle.
Dependencies are inferred from the claim text.