Electricity: battery or capacitor charging or discharging – Battery or cell charging – Pulsed
Reexamination Certificate
2008-09-25
2010-11-16
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
Pulsed
C320S139000, C320S145000, C327S131000, C327S134000, C327S135000, C327S137000, C327S140000, C363S020000, C363S021010, C363S021080, C363S021100
Reexamination Certificate
active
07834592
ABSTRACT:
A circuit includes a pulse transformer having primary and secondary windings. An oscillating waveform is applied to the primary winding to induce an oscillating waveform at the secondary winding. A transistor in series with a first resistor is coupled between the secondary winding and the ground. An R-C network formed by a second and a third resistor and a capacitor is coupled to a base junction of the transistor. The R-C network causes a slow, tapered linear pinch off of the transistor's conductance to enable the circuit to output a triangular waveform, which is characterized by a relatively short linear rise time followed by a substantially long linear fall time. The R-C network is coupled to the secondary winding via a first and a second diode, respectively.
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Calcote Clyde Ray
Huffman James Earl
Smith Pete Ward
Sykes David Lee
Gardere Wynne & Sewell LLP
Hernandez Manuel
PulseTech Products Corporation
Tso Edward
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