Equalizer circuit and receiving apparatus using the same

A reception apparatus comprising:

• equalizer circuitry,
• analog-to-digital conversion circuitry that converts a signal output from the equalizer circuitry to a digital signal, and
• digital reception processing circuitry that performs reception processing on the digital signal and outputs a result as reception data,
• the equalizer circuitry including
• one or more phase-to-phase connection circuitry each including an phase-to-phase capacitor and first, second, third, and fourth phase-to-phase switches, one terminal of each of the first, second, third, and fourth phase-to-phase switches being connected to a corresponding one of first, second, third, and fourth connection paths to which first, second, third, and fourth converted signals are respectively input, the first, second, third, and fourth converted signals being generated by converting an input signal, the first, second, third, and fourth converted signals being different in phase by 90° from one converted signal to a next converted signal, the phase-to-phase capacitor being connected to the other one terminal of each of the first, second, third, and fourth phase-to-phase switches,
• control signal generation circuitry that generates, by converting a reference signal with a particular frequency, 4-phase control signals being different in phase by 90° from one control signal to a next control signal for controlling turning-on/off of the first, second, third, and fourth phase-to-phase switches and outputs the resultant 4-phase control signals respectively to the first, second, third, and fourth phase-to-phase switches, and
• first, second, third, and fourth output buffers that are respectively connected to the first, second, third, and fourth connection paths and that respectively output 4-phase output signals,
• wherein a closing of the first, second, third, and fourth phase-to-phase switches are started from any one of phase-to-phase switches in a first order based on the 4-phase control signals, and
• the first order is a first ascending circulation of the first, the second, the third, and the fourth phase-to-phase switch or a first descending circulation of the fourth, the third, the second, and the first phase-to-phase switch.