Differential input interface circuit and method for adjusting DC levels of differential input signals
First Claim
1. A differential input interface circuit within a system responsive to differential inputs and providing differential outputs comprising:
- a reference level generation means responsive to a first DC level from said system for generating a second DC level which coincides with said first DC level from said system; and
a DC level matching means for matching said first DC level of said differential input signals to said second DC level generated by said reference level generation means.
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Accused Products
Abstract
A differential input interface circuit includes a reference level generation stage generating a DC level that coincides with the DC level within the system; capacitors for cutting-off the DC level of the differential input signals; resistors for matching the average of the non-inverting phase signal and the inverting phase signal of the differential input signals from which the DC levels have been cut-off on the output DC level generated by the reference level generation stage. Thus, a differential input interface circuit make it possible to match the DC level of differential inputs to the DC level within a system which is responsive to the differential inputs.
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Citations
9 Claims
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1. A differential input interface circuit within a system responsive to differential inputs and providing differential outputs comprising:
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a reference level generation means responsive to a first DC level from said system for generating a second DC level which coincides with said first DC level from said system; and
a DC level matching means for matching said first DC level of said differential input signals to said second DC level generated by said reference level generation means. - View Dependent Claims (2, 3, 4, 5)
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6. A method for matching DC levels of differential input signals to a DC level within a system which is responsive to differential inputs, comprising the steps of:
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cutting-off the DC level of the differential input signals; and
superimposing differential inputs signals from which the DC level has been cut off on the DC level within the system, wherein superimposing the differential inputs signals further comprises matching the average between a non-inverting phase signal and an inverting phase signal of the differential input signals from which the DC level was cut-off on the DC level within the system.
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7. A method for generating within a system a differential input interface circuit responsive to differential input signals and providing differential outputs comprising the steps of:
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providing a reference level generation means responsive to a first DC level from said system for generating a second DC level which coincides with said first DC level from said system; and
matching said first DC level of said differential input signals to said second DC level generated by said reference level generation means. - View Dependent Claims (8, 9)
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Specification