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US 4,045,775 AGranted
Continuous DC control circuit
AssigneeGTE Sylvania Incorporated
InventorDaniel S. Pearce
Life of this patent
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Abstract
A continuous DC control circuit includes a memory capacitor coupled to a sampling means providing an output signal representative of the charge thereon and to a charge and discharge circuit means connected to a switching means coupled to a potential source and to a control circuit means for selectively altering the operation of the switching means to effect application of different potential levels to cause different rates of charging and discharging of the memory capacitor.
Claims2
In a remote control for a television receiver, a continuous DC control circuit comprising:
- a charge storage capacitor;
- an FET having an isulated gate coupled to said charge storage capacitor and a source coupled to a voltage divider for providing an output in accordance with the potential level of said charge storage capacitor;
- a charge and discharge circuit coupled to said charge storage capacitor, said circuit comprising a series connection of a first resistor, a parallel connected second resistor and a diode, and a third resistor connected to circuit ground;
- a switching transistor coupled to said charge and discharge circuit, said transistor operating to provide first and second levels of potential to said charge and discharge circuit, thereby effecting different rates of charging and discharging said charge storage capacitor in accordance with said levels of applied potential;
- a DC potential source;
- and
- a control circuit coupled to said DC potential source and to said switching transistor for selectively altering the operation of said switching transistor in response to signals of a first and a second frequency.
4 more elements
Dependencies are inferred from the claim text.