| 摘要 |
System and method for digitally generating a pulse width modulated (PWM) signal with dither based on a command signal, the signal having a pulse width proportional to the command signal. In the preferred embodiment, the PWM signal with proportional dither energizes a load, such as a variable force solenoid, with a desired electrical current. The system includes a base signal generator (30) for generating a base signal having a pulse width which is based on a command signal representing the desired electrical current. The system also includes a dither signal generator (32) for digitally generating a dither signal having a pulse width proportional to the command signal, and a summer (50) for combining the base signal and the dither signal to obtain the pulse width modulated signal with proportional dither. <IMAGE> |
