Title:
トグルモジュールへのフィードバックを備えるパルス幅変調
Document Type and Number:
Japanese Patent JP4098091
Kind Code:
B2
Abstract:
A pulse-width modulation technique uses a counter load value that alternates between a duty-cycle defining value and its complement. In one embodiment, a pulse-width modulated signal is produced as a function of a control signal used to reload the counter in response to the counter reaching an overflow threshold value. This approach includes storing the counter load value and counting relative to a logic circuit output value which corresponds to either the load value or its complement. The counting is reinitiated using the logic circuit output in response to the counter reaching an overflow threshold value. A specific example application of the above type of PWM approach is directed to implementation in otherwise conventional up/down digital counters such as exists in 80C51-type microcontrollers.
Inventors:
Houghton William
Application Number:
JP2002576300A
Publication Date:
June 11, 2008
Filing Date:
March 21, 2002
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H03K7/08; G06F1/025
Domestic Patent References:
| JP62045216A | ||||
| JP4133515A | ||||
| JP8088566A | ||||
| JP61251226A | ||||
| JP7177038A |
Attorney, Agent or Firm:
Kenji Yoshitake
Hidetoshi Tachibana
Takeshi Sekine
Takahashi
Hidetoshi Tachibana
Takeshi Sekine
Takahashi