CPC H02H 9/045 (2013.01) [G01R 19/10 (2013.01); G01R 19/16571 (2013.01); H02H 1/0007 (2013.01); H03K 17/0822 (2013.01); H03K 17/0826 (2013.01)] | 16 Claims |
1. A clamping and detection circuit, comprising:
a clamping sub-circuit, comprising:
a first clamping transistor coupled to a bus node and a first node,
a first diode coupled to the bus node and the first node,
a first high pass filter coupled to the bus node and a control input of the first clamping transistor,
a second clamping transistor coupled to the first node and a common mode node,
a second diode coupled to the first node and the common mode node, and
a second high pass filter coupled to the common mode node and a control input of the second clamping transistor;
a positive overshoot current detection sub-circuit, comprising:
a first transistor coupled to the first node,
a current mirror coupled to the first transistor,
a reference current source coupled to the current mirror at a second node, and
a first comparison device coupled to the second node; and
a negative overshoot current detection sub-circuit, comprising:
a biasing sub-circuit coupled to the first node,
a second transistor coupled to the biasing sub-circuit,
a resistor coupled to a supply voltage node and the second transistor at a third node, and
a second comparison device coupled to the third node.
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