COMPLEX SIGNAL PROCESSING CIRCUIT, RECEPTION CIRCUIT, AND SIGNAL REPRODUCTION DEVICE

摘要

An analog complex filter (101) synthesizes a common-mode signal (I0) and an orthogonal signal (Q0) and outputs analog signals (I1, Q1). Analog/digital converters (102i, 102q) convert the analog signals (I1, Q1) to digital signals (I2, Q2). In order to attenuate a component corresponding to the orthogonal signal (Q0) from the digital signal (I2) to output as a digital signal (I3) and to attenuate a component corresponding to the common-mode signal (I0) from the digital signal (Q2) to output as a digital signal (Q3), a digital complex filter (103) subjects the digital signals (I2, Q2) to complex calculation and outputs the digital signals (I3, Q3). An IQ imbalance correction circuit (104) corrects an orthogonal error and an amplitude error between the digital signals (I3, Q3).