A double edge triggered counter is designed, and the redundancy attribute of the circuit is utilized to decrease the power consumption of the system.
设计了双边沿触发计数器，并利用电路的冗余特性，降低了系统的功耗。
2
Each one of a pair of conductive terminals (12) may be located on opposite surfaces of the circuit board so that the leads (28) from an LED (26) will straddle an upper edge of the circuit board.
Demodulator separately extracted falling and rising edge in input signal, and then synthesized digital signal to a digital circuit, achieve high-speed demodulation circuit.