PatentVote.com: Vote on your favourite invention!

Next ten patents ordered by date:
Higher density insulated gate field effect circuit
Compliant MHD electrode structure
Electrical machinery
Dual position air gap baffle assembly for a dynamoelectric machine
Electromagnetic machines
Preassembleable brush assembly
Salient pole of a synchronous electric machine
Transducer assembly for megasonic cleaning
Internally supported flat tube display
Internally supported flat tube display
Translate:
En
De
Es
Fr
It
Pt
Ja
Ko
Zh 

 

Title: Chopper including transistor switches

Abstract: A chopper having four transistor switches and driven by an AC reference signal provides an alternating output signal. During each half period of the reference signal two of the transistor switches are nonconductive, one is conductive and the fourth commutates at a frequency representative of the error between the reference signal amplitude and a predetermined proportion of the output signal amplitude. Conduction losses are minimized.


Do you think this is a good invention? Vote now:

 Votes so far: For:(0) Against:(0)
Other info:


Inventors: Lannuzel, Roger (Saint-Denis, FR)

Application Number: 775685
Filing Date: 1977-03-08
Publication_date: 1978-10-03
Assignee: Compagnie Industrielle des Telecommunications S.A. (Paris, FR)
Primary Class(es): 327/124 327/482, 363/124
Other Classes:
US Patent Ref:
3283238Nov, 1966Huge et al.323/75.
3290573Dec, 1966Kamens307/240.

Other Refs:
Primary Examiner: Miller, Jr., Stanley D.
Assistant Examiner: Davis, B. P.
Attorney: Sughrue, Rothwell, Mion, Zinn and Macpeak