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US 6,294,961 B1Granted
Selectable voltage-controlled oscillation circuit
AssigneeAlps Electric Co., Ltd.
InventorToshiki Baba
Life of this patent
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Abstract
A selectable oscillation circuit includes a first oscillation circuit, a second oscillation circuit, and a selector circuit. The selector circuit selectively switches on and off the first oscillation circuit and the second oscillation circuit, in accordance with the provision of a selector signal, to selectively switch between two communicating modes, with low-power consumption.
Claims5
A selectable oscillation circuit comprising:
- a first oscillation circuit including a first oscillation transistor;
- a second oscillation circuit including a second oscillation transistor;
- and
- a selector circuit including a first selector terminal connected to said first oscillation circuit and a second selector terminal connected to said second oscillation circuit, said selector circuit selectively switching on and off said first oscillation circuit and said second oscillation circuit in accordance with the provision of a selector signal, wherein:
- said first selector terminal is connected to a grounding terminal of an emitter load and a grounding terminal of a base-bias resistor of said first oscillation transistor;
- and
- said second selector terminal is connected to a grounding terminal of an emitter load and a grounding terminal of a base-bias resistor of said second oscillation transistor.
4 more elements
An oscillation circuit controlled by a selector circuit for selectively activating or deactivating said oscillation circuit, said oscillation circuit comprising:
- an oscillation transistor,
- an emitter load, and
- a base-bias load, wherein
- said emitter load and said base-bias load are connected to together, on their respective grounding sides, and connected to said selector circuit such that when said oscillation circuit is deactivated, no current flows through said base-bias load.
1 more element
Dependencies are inferred from the claim text.