Circuit for a lossless capacitive pump

Details Circuit for a lossless capacitive pump Circuit for a lossless capacitive pump

H - Electricity

03

F

H03F 3/04 (2006.01) H02M 3/07 (2006.01) H03F 3/19 (2006.01) H03F 3/193 (2006.01)

Patent

CA 2404185

A capacitive pump circuit suitable for use in loop powered level measurement and time of flight ranging systems. The capacitive pump circuit comprises an input buffer, a level shifter and an output stage. The input buffer receives a clocking signal which is also coupled to the input of the output stage through the level shifter. The output from the input buffer is switched by the output stage to charge a capacitor and generate a voltage output which has the opposite polarity of the voltage supply rail. According to another aspect, a capacitive voltage doubter circuit is provided which is also suitable for use in loop powered level measurement and time of flight ranging systems.

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