Patent ID: 8879223

Claim:
An integrated electromagnetic interference (EMI) filter circuit with electrostatic discharge (ESD) protection and incorporating capacitors, comprising: a) at least one passive element connected between an input terminal and an output terminal; b) a first capacitor and a second capacitor, wherein said first capacitor is connected between ground and said input terminal, and said second capacitor is connected between ground and said output terminal; c) a first diode and a second diode, wherein an anode and a cathode of said first diode are respectively connected to said input terminal and ground, an anode and a cathode of said second diode are respectively connected to said output terminal and ground, and said first capacitor, said second capacitor, said first diode and said second diode are connected in parallel; d) at least one parallel capacitor connected in parallel to said at least one passive element and between said input terminal and said output terminal for frequency compensation; and e) a third capacitor and a fourth capacitor when said at least one passive element comprises first, second, and third passive elements connected in series between said input terminal and said output terminal, wherein said third capacitor is connected between ground and a node of said first and second passive elements, and said fourth capacitor is connected between round and a node of said second and third passive elements, wherein said at least one parallel capacitor comprises a first and second parallel capacitors, said first parallel capacitor being connected to said input terminal and said node of said second and third passive elements, and said second parallel capacitor is connected to said output terminal and said node of said first and second passive elements.