Patent ID: 9413231
Filing Date: 2016-08-09
CPC Classification: G05F,G11C,H02M,H03K

Claim Text:
1. An electrical circuit comprising: a charge pump circuit configured to generate a charge pump voltage; a bias circuit configured to receive the charge pump voltage to generate a reference current; and a plurality of switch circuits, each switch circuit in the plurality of switch circuits being configured to receive a switch current that is generated from the reference current, to generate a constant gate-source voltage from the switch current, and to apply the gate-source voltage to a first transistor to selectively connect an input node to an output node of a computer interface port, wherein each switch circuit in the plurality of switch circuits comprises an impedance element configured to receive the switch current to generate the gate-source voltage, wherein each switch circuit in the plurality of switch circuits further comprises a resistor that is in series with the impedance element and the gate-source voltage comprises voltage drops on the impedance element and the resistor.