Switching type oscillation signal return circuit


Application Number: 00108047
Application Date: 2000.06.08
Publication Number: 1278122
Publication Date: 2000.12.27
Priority Information: 1999/6/16 JP 169781/99
International: H03B5/02;H03B5/08
Applicant(s) Name: ALPS Electric Co., Ltd.
Address:
Inventor(s) Name: Umaba Toshiki
Patent Agency Code: 11216
Patent Agent: liu jiyang
Abstract A selectable oscillation circuit includes 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 the first oscillation circuit and a second selector terminal connected to the second oscillation circuit, the selector circuit selectively switching on and off the first oscillation circuit and the second oscillation circuit in accordance with the provision of a selector signal. In the selectable oscillation circuit, the first selector terminal is connected to a grounding terminal of an emitter load, which is connected to the first oscillation transistor, and a grounding terminal of a base-bias resistor of the first oscillation transistor, and the second selector terminal is connected to a grounding terminal of an emitter load, which is connected to the second oscillation transistor, and a grounding terminal of a base-bias resistor of the second oscillation transistor.