CPC G01R 19/2509 (2013.01) [H03F 3/45475 (2013.01); G01R 19/0053 (2013.01); H03F 2200/129 (2013.01); H03F 2200/171 (2013.01); H03F 2203/45116 (2013.01)] | 20 Claims |
1. Current sensing circuitry, comprising:
a differential amplifier comprising first and second inputs configured to sense a current across a sense resistance, and an output configured to output a current sense signal;
a first current source;
a second current source; and
a switch network operable in:
a first phase in which the first current source is connected to the first input and disconnected from the output, and the second current source is connected to the output and disconnected from the first input; and
a second phase in which the first current source is connected to the output and disconnected from the first input, and the second current source is connected to the first input and disconnected from the output.
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