Patent ID: 7215157
Filing Date: 2007-05-08
Classification: H03F,H03K,H04L

Abstract:
1. A small-amplitude differential interface circuit comprising: first, second and third current generators; first and second switching devices, and a controlling device to place both of said first and second switching devices in an on-state when a control voltage for said first switching device and a control voltage for said second switching device are equal to each other in transition when output polarity is changed, wherein current values of said first and second current generators are equal to each other and a current value of said third current generator is twice as large as the current value of said first and second current generators, said first current generator and said third current generator are connected to each other through said first switching device and said second current generator and said third current generator are connected to each other through said second switching device, and a first output is taken out from a node between said first switching device and said first current generator, and a second output is taken out from a node between said second switching device and said second current generator, wherein said first and second switching devices operate in a saturation region when in said on-state.