Circuit protecting against electrostatic discharge

Details Circuit protecting against electrostatic discharge Circuit protecting against electrostatic discharge

2005-01-25

2005-01-25

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S058000, C361S111000, C361S119000

Reexamination Certificate

active

06847511

ABSTRACT:
A quarter wavelength transmission line is provided between a signal transmission line for transmitting a high frequency signal and a ground node. The quarter wavelength transmission line has a length equal to a quarter of an effective wavelength of an operation frequency of a semiconductor device. A surge absorbing element is connected between the quarter wavelength transmission line and an internal circuit. The signal transmission line is coupled to the internal circuit through a capacitor. A clamp circuit is provided between a power supply line and a ground line. The clamp circuit clamps the voltage difference between the power supply line and the ground line to a prescribed voltage level or less. A high frequency semiconductor device is thus implemented which is capable of preventing breakdown of an internal circuit element due to an electrostatic discharge phenomenon (ESD) without degrading high frequency characteristics.

REFERENCES:
patent: 4455586 (1984-06-01), McCartney
patent: 4930644 (1990-06-01), Robbins, III
patent: 5416660 (1995-05-01), Shiga
patent: 5-110356 (1993-04-01), None
patent: 6-112850 (1994-04-01), None
patent: 11-266529 (1999-09-01), None
Ker et al.; “Novel Octagonal Device Structure of Output Transistors in Deep-Submicron Low-Voltage CMOS Technology”,IEEE, IEDM, 96-889, pp. 889-892 (1996).
Groves et al.; “High Q Inductors In a SIGe BiCMOS Process Utilizing a Thick Metal Process Add-on Module”,IEEE BCTM, 9, 3, pp. 149-152 (1999).
K. Bock; “ESD Issues in Compound Semiconductor High-Frequency Devices and Circuits”,EOS/ESD Symposium, pp. 1-12, (1997).

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