| 摘要 |
A selectable oscillation circuit includes a first oscillation circuit (1) including a first oscillation transistor (11), a second oscillation circuit (2) including a second oscillation transistor (21), and a selector circuit (3) including a first selector terminal (4) connected to the first oscillation circuit and a second selector terminal (5) 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. <IMAGE> |
