| 摘要 |
The present invention relates to a method and an apparatus for a multi-channel current driving, more particularly, to a controlling technology which establishes to have each time constant when a digital control and an analog control is performed using a low pass filter in a structure which a digital control and an analog control are available according to a configuration of a current control, and which simultaneously controls the digital control and the analog control using the established time constant. More specifically, the present invention adjusts a current for each channel using an OFFSET circuit upon the digital control according to the time constant of the low pass filter using the low pass filter and the OFFSET filter for each channel, and controls an amount of current to be equal by changing with PWM DUTY. Upon the analog control, the present invention is to provide a method and apparatus for a multichannel current driving which controls an amount of current with the combination of a smoothen voltage and a voltage of the OFFSET generation circuit using a high frequency PWM and a low pass filter. |
