Patent ID: 7561001

Claim:
An electronic circuit device comprising: a resonator; a negative resistance generating circuit that has a first transistor having a control terminal coupled to the resonator; a second transistor that has a control terminal coupled to an output terminal of the first transistor and has an output terminal coupled to a DC bias terminal, wherein the second transistor has the control terminal, a first terminal acting as the output terminal, and a second terminal coupled to the output terminal of the first transistor; a path that is coupled to between the DC bias terminal and the output terminal of the first transistor through the second transistor and provides a bias to the first transistor; a first inductor provided between the output terminal of the first transistor and a node, the node being coupled to the control terminal of the second transistor and the path; a second inductor provided between the node and the second terminal of the second transistor; and a resistor provided between the second inductor and the second terminal of the second transistor.