Patent ID: 9531355
Filing Date: 2016-12-27
CPC Classification: H03K

Claim Text:
1. An electronic device, comprising: a conversion circuit configured to receive an input signal and to generate an input current, the input current being proportional to a frequency of the input signal and to a capacitance of a conversion capacitor; a first circuit configured to generate an output control signal when a first voltage across a first capacitor receiving the input current exceeds a threshold voltage, in response to the input signal having a first logic level, a second circuit configured to generate an output reset signal when a second voltage across a second capacitor receiving the input current exceeds the threshold voltage, in response to the input signal having a second logic level; and a flip flop configured to generate a signal output as having the first logic level in response to the output control signal, and to reset and generate the signal output as having the second logic level in response to the output reset signal.