Signal processing circuit and position detecting device using the same

A positioning detecting device, comprising a signal processing circuit, wherein the signal processing circuit comprises a control unit, a transmission drive unit, an analog switch array, a signal amplification unit, a detection integration unit that are connected in sequence, and a transceiver antenna connected to the analog switch array;

• the control unit comprises an analog-to-digital converter, and each of the analog-to-digital converters at least comprises two channels;
• the signal processing circuit further comprises a linear signal converter arranged between the analog-to-digital converter and the signal amplification unit, the linear signal converter is configured to linearly convert signals received by the transceiver antenna, and transmit the linearly converted signals to the analog-to-digital converter;
• and the detection integration unit and the linear signal converter are both connected to the analog-to-digital converters, the signals received by the transceiver antenna respectively travel through the detection integration unit and the linear signal converter and are simultaneously transmitted to the analog-to-digital converters respectively over the channels, and the analog-to-digital converters process the signals transmitted by the detection integration unit or the linear signal converter.