Patent ID: 7894558

Claim:
A receiver circuit comprising: an active filter circuit including an active filter which filters an inputted transmission signal using a predetermined frequency characteristic, and an adjusting circuit which adjusts the frequency characteristics of said active filter; a receiving device including a demodulator which demodulates the filtered transmission signal; and a control device which controls a power source of said receiving device using a first power source control signal, and controls a power source of said active filter circuit using a second power source control signal, wherein said control device controls the power source of said receiving device using the first power source control signal, upon reception of data including a plurality of reception slots having a guard bit provided between reception slots adjacent to each other, the first power source control signal becoming a power source ON signal before starting of reception of the data, the first power source control signal becoming a power source ON signal after temporarily becoming a power source OFF signal within the guard bit, and the first power source control signal becoming a power source OFF signal after completing the reception of the data, and wherein said control device also controls the power source of said active filter circuit using the second power source control signal, the second power source control signal becoming a power source ON signal before starting of the reception of the data, and thereafter, maintaining the power source ON signal as an ON signal until the second power source control signal becomes a power source OFF signal after completing the reception of the data.