Patent ID: 8638105
Filing Date: 2014-01-28
Classification: G01R

Abstract:
1. A cell telemetry sample and hold amplifier system comprising: a telemetry sampling transformer comprising a primary winding operable to couple to a battery and a secondary winding operable to couple to a sampling capacitor and output a measured telemetry voltage; a pulse driven switch coupled to the primary winding of the telemetry sampling transformer; a voltage clamp mechanism coupled to a winding of the telemetry sampling transformer and operable to balance volt-seconds applied to the winding of the telemetry sampling transformer and force an average magnetizing current in the telemetry sampling transformer to about zero amperes; driver means coupled to the pulse driven switch and the voltage clamp mechanism, and operable to drive the pulse driven switch and the voltage clamp mechanism; a synchronized sampling switch coupled to the secondary winding of the telemetry sampling transformer and operable to electrically couple the secondary winding of the telemetry sampling transformer to the sampling capacitor; and drive circuits coupled to the pulse driven switch, the voltage clamp mechanism, and the synchronized sampling switch, and operable to simultaneously turn on the pulse driven switch and the synchronized sampling switch while turning the voltage clamp mechanism off.