Mcd Lily Series Baby Monitor Transmitter

Since the 1980s, manufacturing industry of 40/49 MHz Baby Monitor Transmitter generally gets operating frequency by crystal oscillation, and then multiplying frequency three times. Therefore, the circuit is filled with unnecessary multiplied harmonic wave and fundamental wave. In order to clear the unnecessary frequency, tune of intermediate frequency turner is generally adopted to select the desired frequencies, which leads to the fact that production debugging becomes complex, and each operating frequency with each corresponding crystal. MCD Lily is characterized by built-in VCO PLL chips of MCD 2006S, whose read-only memory saves all frequency points of 40/49MHz baby monitor. By simply setting level of 4 input ports according to fixed logic, programming MCU could be reduced. With the chips, manufacturers could:
1. Reduce production manpower.
2. Reduce production cost.
3. Simplify production process.
4. Improve product stability.
5. Pass CE/FCC certification easily.