YAN LING ZHENG
Real Estate Commission in Philadelphia, PA
License number
Pennsylvania RS299677
Category
Real Estate Commission
Type
Real Estate Salesperson-Standard
Address
Address
Philadelphia, PA 19147
Personal information
See more information about YAN LING ZHENG at radaris.comName
Address
Phone
535 Sunnyfield Dr, Monroeville, PA 15146
343 Broadway, Bethlehem, PA 18015
3466 Friendship St, Philadelphia, PA 19149
431 Greene Ln, Phoenixville, PA 19460
1426 S 10Th St, Philadelphia, PA 19147
Professional information
Linear Regulating Switch
US Patent:
7489198, Feb 10, 2009
Filed:
Apr 26, 2007
Appl. No.:
11/789874
Inventors:
Bruce M. Cepas - Little Egg Harbor NJ, US
Noel Delgado - Mount Laurel NJ, US
Yan Zheng - Philadelphia PA, US
Noel Delgado - Mount Laurel NJ, US
Yan Zheng - Philadelphia PA, US
Assignee:
Lockheed Martin Corporation - Bethesda MD
International Classification:
G05F 1/00, H03G 3/00, H03F 3/04, H02M 3/18
US Classification:
330297, 323265, 323271, 330127, 363 60
Abstract:
A switched linear regulator includes a control device with a controlled current path and a control electrode. The current path is connected in series with a source of voltage and a load. An error signal generator compares the load voltage with a reference value to generate a degenerative error signal. The error signal is coupled to the control electrode with a voltage offset. An OFF control signal source includes a transistor which is connected to the control electrode to swamp or overpower the error signal, and render the controlled current path nonconductive. Thus, the same active control element both linearly regulates and provides an ON-OFF function. A speed-up transistor responds to the OFF signal to short the control electrode to a reference voltage to quickly discharge capacitance at the control electrode.