Pulse-width modulator
Patent 4742316 Issued on May 3, 1988. Estimated Expiration Date: 
April 13, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 13, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3452297 3568094 InventorApplicationNo. 07/037765 filed on 04/13/1987US Classes:332/110Including discrete semiconductor device having three or more electrodesExaminersPrimary: LaRoche, Eugene R.Assistant: Mis, David Attorney, Agent or FirmInternational ClassesH03K 7/08 (20060101)H03K 7/00 (20060101) Foreign Application Priority Data1986-06-09 DEAbstractA pulse-width modulator comprising a square-wave generator which triggers a monostable multivibrator driven by a controllable constant current source, the multivibrator having a capacitor as a timing element. The output of the multivibrator controls a gate circuit to which the square wave is also applied, thereby controlling the width of the square wave output from the gate circuit. The modulator can be assembled from standard CMOS building blocks and several external components, thereby achieving a power dissipation below 10 mW. If the current source is controlled by a CMOS variable-gain amplifier, the modulator can serve as the control circuit of a clocked direct voltage converter having internal losses below 25 mW. | |
