Abstract: An analog signal processing apparatus generates a reference voltage for a microcontroller by utilization of interrupting the microcontroller when two similar analog sinusoidal signals with a phase difference cross over, and evaluating the positive and negative crossover voltages and their average as a temporary reference voltage that is evaluated for several times to avoid errors in the two analog input signals due to noise interference or voltage drift. Finally, the evaluated temporary reference voltages are averaged and set to be the reference voltage for the microcontroller.

Abstract: An analog signal processing apparatus generates a reference voltage for a microcontroller by utilization of interrupting the microcontroller when two similar analog sinusoidal signals with a phase difference cross over, and evaluating the positive and negative crossover voltages and their average as a temporary reference voltage that is evaluated for several times to avoid errors in the two analog input signals due to noise interference or voltage drift. Finally, the evaluated temporary reference voltages are averaged and set to be the reference voltage for the microcontroller.

Abstract: A remedy for data loss generated during a wireless communication process is to incorporate a data sequence identification field into a data frame to be transmitted from a wireless transmitting end to a wireless receiving end. The data sequence identification field contains a first data value representing a sequence number of the data frame, and the wireless receiving end records a second data value representing the sequence number of the data frame next to the last data frame the wireless receiving end has received. The wireless receiving end compares the first data value with the second value to determine whether the received data frame is a succession of the last data frame the wireless receiving end has received, so as to remind the user of the lost data frame by generating alarm signal or send retransmission request signal to request the wireless transmitting end to retransmit the lost data frame.