Switching operation sensing device that distinguishes touch regions on surface of integrated housing

A switching operation sensing device to be added to an electronic device, the electronic device comprising an input operation unit comprising a first touch member and a second touch member, the switching operation sensing device;

• comprising:
• an oscillator circuit configured to generate a first oscillation signal based on a first variable resonant frequency when the first touch member is touched, and generate a second oscillation signal based on a second variable resonant frequency when the second touch member is touched;
• and a touch detector circuit;
• comprising:
• a frequency calculator circuit, configured to convert the first oscillation signal and the second oscillation signal into a first count value and a second count value;
• and a touch operation distinguishing circuit, configured to distinguish respective touch regions of the first touch member and the second touch member, based on calculation values generated based on the first count value and the second count value.