Patent ID: 7557646
Filing Date: 2009-07-07
Classification: H01L

Abstract:
1. A semiconductor circuit installed on a printed circuit board having a first wiring pattern and a second wiring pattern, comprising: a first power supply terminal and a first ground terminal which are provided for a first side of said semiconductor circuit, wherein said first power supply terminal is connected with said first wiring pattern and said first ground terminal is connected with said second wiring pattern; and a second power supply terminal and a second ground terminal which are provided for a second side opposing to said first side, wherein said second power supply terminal is connected with said first wiring pattern and said second ground terminal is connected with said second wiring pattern, wherein said first and second power supply terminals, and said first and second ground terminals are arranged such that said first wiring pattern and said second wiring pattern do not intersect in a region of said wiring substrate corresponding to said semiconductor circuit, and wherein said second wiring pattern is connected with an oscillator terminal through a current source and a pull-down resistor which is connected with the current source, and said current source variably controls a current in response to a control signal.