U-side wireless remote control transmitting circuit

Shown is the U-side wireless remote control transmitting circuit using PT2262 chip . This circuit has only one switch (sw) that inputs the command signal to the chip. After being processed by the chip , the signal is output from the @ pin, which is amplified and then emitted. In the transmitter circuit , an LC resonant circuit is used in the transistor collector circuit to fine-tune the RF frequency.