#$%^&*AU2014100961A420140925.pdf#####Title: Regulation Drive Circuit for Wheelchair Seat and Backrest Abstract The present invention discloses a novel drive circuit for regulation of a seat and a backrest of a wheelchair, comprising a left bridge drive circuit and a right bridge drive circuit for controlling left and right traveling motors of a wheelchair. The left bridge drive circuit comprises first to fourth field effect transistors (Q1-Q4). The right bridge drive circuit comprises fifth to eighth field effect transistors (Q5-Q8). A drive circuit for controlling a backrest motor is connected to the first and third field effect transistors (Q1, Q3) and the fifth and seventh field effect transistors (Q5, Q7), respectively. A drive circuit for controlling a seat motor is also connected to the first and third field effect transistors (Q1, Q3) and the fifth and seventh field effect transistors (Q5, Q7), respectively. M.. .. . M -........ 1 ~ PNIN ----------------------------
