Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1993-06-08
1996-01-09
O'Shea, Sandra L.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327513, 327563, G06G 710, H03F 130, H03K 5153, H03H 1702
Patent
active
054831849
ABSTRACT:
A receiver for providing binary signals from a transmission line to a data system is disclosed. The receiver includes a differential comparator for comparing a reference voltage to an input voltage and for providing a comparator output signal in response to the comparison. The comparator output signal indicates whether the input voltage is greater or less than the reference voltage. A first current source is coupled to the differential comparator for providing current to the differential comparator. The first current source provides substantially the same amount of current to the differential comparator whether the input voltage is greater or less than the reference voltage, and the first current source has a positive temperature coefficient so that when temperature increases the current provided by the first current source increases. A middle stage amplifies the comparator output signal to produce a middle stage output signal and compensates the middle stage output signal for variations in temperature.
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National Semiconductor Corporation
Ning John
O'Shea Sandra L.
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