Patent ID: 7816882
Filing Date: 2010-10-19
Classification: G05B

Abstract:
1. A detection circuit for detecting states of a first position signal and a second position signal, the detection circuit comprising: a rising edge detection device configured to receive the first and second position signals and output a first control signal, wherein when detecting a rising edge of the second position signal, the rising edge detection device is configured to output the first position signal as the first control signal; and a falling edge detection device configured to receive the first and second position signals and output a second control signal, wherein when detecting a falling edge of the second position signal, the falling edge detection device is configured to output the first position signal as the second control signal, wherein the detection circuit is carried by an electronic apparatus comprising an encoder, a code strip, and a DC motor, and wherein while moving along the code strip, the encoder is configured to generate the first and second position signals for control of the DC motor, wherein the first position signal and the second position signal are in normal states when the first and second control signals are out of phase, and wherein the first position signal and the second position signal are in abnormal states when the first and second control signals are in phase.