ELECTRIC FIELD STRENGTH AND CURRENT VOLTAGE DETECTION CIRCUIT, AND TELEPHONE SET USING IT

摘要

PROBLEM TO BE SOLVED: To provide an electric field strength and current voltage detection circuit that can reduce number of components, a component mount area and the cost by using a voltage detection circuit in common. SOLUTION: Parts of an electric field strength detection circuit to detect the electric field strength of a received radio wave and parts of a battery voltage detection circuit to detect a battery voltage are designed in common and the electric field strength and current voltage detection circuit is provided with an electronic switch 4 that selectively switches the circuit in common (voltage detection circuit 9) into the electric field strength circuit side or the battery voltage detection circuit side.