Offset voltage correction network for instantaneous floating point amplifier
First Claim
1. An instantaneous floating point amplifier, comprisingan analog signal input summation network for receiving analog data signals,synchronized means for storing a predetermined value of offset voltage said synchronized means coupled to said analog signal input summation network for effectively subtracting an offset voltage component from said analog data signals,a sample-and-hold network coupled to receive an output signal from said summation network,cascaded amplifier means coupled to said sample-and-hold network for developing an analog mantissa value for said sampled-and-held data and a digital gain word related thereto, andan analog-to-digital converter coupled to said cascaded amplifier means for converting said analog mantissa value to a digital mantissa value, which, with said digital gain word, represents in digital form said sample analog data.
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Accused Products
Abstract
Disclosed is an instantaneous floating point amplifier which continuously generates an offset correction voltage level for each possible gain word controlling an internal cascaded amplifier. The offset voltage levels are digitized and stored until an input data signal is received. A portion of the output analog-to-digital converter system for the floating point amplifier is utilized on a time sharing basis to regenerate an analog offset correction voltage. The offset correction voltage is input into a summing network inserted into the amplifier circuit between internal preamplifier and amplifier components. When the input signal has been grounded, the offset correction voltage is disconnected from the input summing network and the floating point amplifier is cycled through its gain operations.
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Citations
26 Claims
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1. An instantaneous floating point amplifier, comprising
an analog signal input summation network for receiving analog data signals, synchronized means for storing a predetermined value of offset voltage said synchronized means coupled to said analog signal input summation network for effectively subtracting an offset voltage component from said analog data signals, a sample-and-hold network coupled to receive an output signal from said summation network, cascaded amplifier means coupled to said sample-and-hold network for developing an analog mantissa value for said sampled-and-held data and a digital gain word related thereto, and an analog-to-digital converter coupled to said cascaded amplifier means for converting said analog mantissa value to a digital mantissa value, which, with said digital gain word, represents in digital form said sample analog data.
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18. An instantaneous floating point amplifier comprising:
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input means for combining at least one data signal and an offset signal; a plurality of amplifiers coupled to said input means for receiving said combined data and offset signal; control means for configuring said plurality of amplifiers in configurations having a pre-established gain, said control means coupled to said input means for coupling an offset signal of said amplifier configurations. - View Dependent Claims (19, 20)
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21. An instantaneous floating point amplifier comprising:
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at least one input signal channel; combining means for providing a combined signal including said input signal and an offset signal; a plurality of amplifiers; control means for configuring said plurality of amplifiers in configurations having predetermined gains; and
,offset means for coupling an offset signal to said combining means, said offset signal determined by an amplifier configuration output signal for a predetermined input signal and an amplifier configuration gain signal. - View Dependent Claims (22)
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23. An instantaneous floating point amplifier comprising:
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at least one input signal source; combining means for combining said input signal and an offset signal into a combined signal; a plurality of amplifiers of receiving said combined signals; control means for configuring said plurality of amplifiers into a multiplicity of amplifier configurations, each of said configurations having a predetermined gain associated therewith; and offset means for storing an error signal and a gain signal for said amplifier configurations, said control means combining said error signal and said gain signal to provide said offset signal for said amplifier configurations. - View Dependent Claims (24)
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25. The method for correcting offset error voltages in an instantaneous floating point amplifier comprising the steps of:
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in an amplifier having a plurality of gain configurations, measuring and storing an amplifier error signal for each amplifier gain configuration when a preselected signal is applied to said amplifier; selecting an amplifier gain configuration; combining an input data signal and an error signal for said selected gain configuration; and applying said combined signal to said amplifier. - View Dependent Claims (26)
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Specification