JAMES G JENNINGS
Physical Therapy at King John Ct, Indianapolis, IN
License number
Florida 10728
Issued Date
Aug 31, 1994
Effective Date
Dec 14, 2003
Expiration Date
Jan 31, 2001
Category
Health Care
Type
Physical Therapist
Address
Address
6611 King John Ct, Indianapolis, IN 46227
Professional information
Drive Circuit For Pincushion Corrector
US Patent:
4686430, Aug 11, 1987
Filed:
Dec 5, 1985
Appl. No.:
6/805492
Inventors:
James R. Jennings - Indianapolis IN
Assignee:
RCA Corporation - Princeton NJ
International Classification:
H01J 2956
US Classification:
315371
Abstract:
A video display apparatus includes a diode modulator for correcting side pincushion raster distortion. The diode modulator drive circuit produces a vertical deflection rate parabolic voltage that modulates the horizontal deflection current to effect pincushion correction. The drive circuit includes a transistor that has its base bias established by the combination of a width control resistor and a diode. The diode has the same thermal characteristics as the transistor to provide accurate temperature compensation. A resistor is connected between the emitter of the transistor and a supply voltage to change the transistor bias point in order to enable the transistor to be cutoff.