| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve ESD (Electrostatic Discharge) tolerance of an amplification IC element, and reduce the number of parts. Ž<P>SOLUTION: One-chip amplification IC element is achieved by connecting a resistor or an inductor for ESD protection, and a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) whose 2 terminals out of 3 terminals are diode-connected, to an amplification element. Moreover, a varistor diode or a chip capacitor is externally connected. The amplification element is protected by the inductor or the resistor and the MOSFET, and the amplification IC element is protected by the varistor diode or the chip capacitor. Moreover, reduction of the number of parts and cost reduction and device miniaturization resulting from the reduced number of parts are achieved using a LPF (Low-Pass Filter) utilizing impedance of the resistor (inductor), the capacity of the MOSFET, and the capacity of the varistor diode (chip capacitor). Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
