Patent ID: 6208195
Filing Date: 2001-03-27
Classification: H03K

Abstract:
A switching device for switching signals in a bi-directional manner along a bus of a printed circuit board, the switching device comprising:a package containing an integrated circuit device that includes a first field effect transistor and a driver circuit, the first transistor having an internal resistance R.sub.i and an internal capacitance C.sub.i, the first transistor including a first input/output terminal, a second input/output terminal and a control terminal, the driver circuit having an output terminal coupled to the control terminal of the first transistor;a first input/output lead directly connected to the first input/output terminal and extending external to the package, the first input/output lead being connected to the bus of the printed circuit board;a second input/output lead directly connected to the second input/output terminal and extending external to the package, the second input/output lead being connected to the bus of the printed circuit board, the bus having a bus capacitance C.sub.b, wherein C.sub.b is finite and greater than C.sub.i, wherein R.sub.i (C.sub.i +C.sub.b) is greater than zero and less than 6.5 nanoseconds; anda control lead coupled to an input terminal of the driver circuit, the control lead extending external to the package, wherein the first transistor is turned on and off in response to a control signal applied to the control lead, the first transistor being configured to pass signals in a bi-directional manner on the bus when the first transistor is turned on, and the first transistor being configured to block signals on the bus when the first transistor is turned off.