CPC H03B 5/04 (2013.01) [H03B 5/36 (2013.01)] | 9 Claims |
1. A circuit device comprising:
a first terminal;
a first oscillation circuit oscillating a resonator and generating a first voltage for automatic gain control for controlling amplitude of a signal output from the resonator;
a digital signal generation circuit generating a digital signal corresponding to the first voltage; and
a first interface circuit outputting the digital signal to the first terminal,
wherein
the digital signal generation circuit includes:
a second oscillation circuit having an oscillation frequency changing according to the first voltage; and
a counter performing count operation based on an output signal of the second oscillation circuit.
|