| 摘要 |
PURPOSE:To reduce the cost by adding a reference clock recognition generating function to an infrared ray remote control reception section so as to allow a transmission section to use a CR oscillator with low frequency accuracy. CONSTITUTION:A very small signal received by a light receiving element 150 is amplified by a digital conversion circuit 151 and converted into a digital signal. Received data subject to digital conversion are received by a reference clock generating circuit 152, in which a reference clock is decided and used for a basic clock when a 153 data discrimination means 153 discriminates data. Thus, no accuracy of a carrier frequency is required for the transmission side and the CR oscillator is employed. The CR oscillator is built in an LSI and the cost of the entire system is reduced. |
