Transmission characteristics measurement apparatus, transmission characteristics measurement method, and electronic device

A transfer characteristic measurement apparatus that measures a transfer characteristic of a circuit under test between input and output, comprising:

• a test signal input section that inputs, to the circuit under test, a test signal having a frequency different from that of a carrier signal supplied during actual operation of the circuit under test;
• and
• a transfer characteristic measuring section that measures the transfer characteristic of the circuit under test at the frequency of the test signal based on a result obtained by sampling the output signal from the circuit under test according to the frequency of the carrier signal.

A method for measuring a transfer characteristic of a circuit under test between input and output, comprising:

• generating a test signal by adding together a carrier signal having a prescribed frequency and an additional signal having a frequency that differs from the prescribed frequency, and inputting the test signal to the circuit under test;
• and
• measuring the transfer characteristic of the circuit under test at the frequency of the additional signal based on a result from a measurement of an output signal output by the circuit under test.

An electronic device comprising an operational circuit and a transfer characteristic measurement circuit that measures a transfer characteristic of the operational circuit between input and output, wherein the transfer characteristic measurement circuit includes:

• a test signal input section that generates a test signal by adding together a carrier signal having a prescribed frequency and an additional signal having a frequency that differs from the prescribed frequency, and inputs the test signal to the operational circuit;
• and
• a transfer characteristic measuring section that measures the transfer characteristic of the operational circuit at the frequency of the additional signal based on a result from a measurement of an output signal output by the operational circuit.