Patent ID: 6774587
Filing Date: 2004-08-10
Classification: H02P

Abstract:
A motor circuit comprising:a first brush-type motor having a first voltage connection and a second voltage connection, the second voltage connection adapted to be coupled to a source of DC voltage; a second brush-type motor having a third voltage connection and a fourth voltage connection, the fourth voltage connection adapted to be coupled to the source of DC voltage; a switch having a control input, a first contact and a second contact, the first contact adapted to be coupled to the source of DC voltage, the second contact coupled to the first voltage connection and the third voltage connection, the switch operable to selectively connect the first contact to the second contact based on a voltage at the control input; and a pulse width modulation circuit operable to generate a pulse width modulated (PWM) signal, the pulse width modulation circuit operably coupled to provide the PWM signal to the control input of the switch.