Patent ID: 7872369

Claim:
A balanced bridge electric gear-shifting mechanism, comprising: a signal input stage, for being configured with an up shifting signal input end and a down shifting signal input end, wherein said up shifting signal input end is connected to a first resistor and said down shifting signal input end is connected to a second resistor; a balanced bridge circuit, for being configured with a third resistor, a fourth resistor, and a fifth resistor, wherein the third resistor is arranged in an electric bridge connecting said first resistor to said second resistor; said fourth resistor is disposed for connecting the first resistor to the ground, and said fifth resistor is disposed for connecting the second resistor to ground; and a signal output stage, for being configured with an up shifting signal output end and a down shifting signal output end, wherein said up shifting signal output end is serially connected with the first resistor and the down shifting signal output end is serially connected with the second resistor.