Patent ID: 6259317
Filing Date: 2001-07-10
Classification: H02M

Abstract:
A switching output stage comprising:a floating power supply providing a relative positive output voltage VP at a first line and a relative negative output voltage VM at a second line;a first single pole, double throw switch connected across the first line and the second line;a second single pole, double throw switch connected across the first line and the second line;a low pass filter connected to the output of the second switch;means for connecting the output of the low pass filter to a positive load terminal; andmeans for connecting ground to a negative load terminal;wherein the first switch has a common to ground and switches between position A to the first line and position B to the second line, and the second switch has a common to the low pass filter and switches between position C to the first line and position D to the second line;such that the voltage across the load is positive when the switches o are in positions B and C, negative when the switches are in positions A and D, 0 when the switches are in positions A and C wherein both terminals are connected to VP, and 0 when the switches are in positions B and D wherein both terminals are connected to VM.