Digital decorrelating random data generator
First Claim
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1. A randomizer device, having a noise input, a clock input and an output, said randomizer comprising:
- feedback means for producing a feedback signal, said feedback means having an input, a clock input, a first output, a second output and a third output, said clock input being coupled to said clock input of said randomizer device and said third output being coupled to said output of said randomizer device;
a comparator having a first input, a second input and an output, said first input being coupled to said noise input of said randomizer means and said output being coupled to said input of said feedback means; and
coupling means for coupling said first and second inputs of said comparator providing a balanced DC voltage and reducing the ripple voltage to said comparator, said coupling means having a first input, a second input, a first output and a second output, said first input being coupled to said first output of said feedback means, said second input being coupled to said second output of said feedback means, said first output being coupled to said first input of said comparator and said second output being coupled to said second input of said comparator.
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Abstract
An apparatus and method is disclosed that provides a random data generator that is less susceptible to error sources resulting from negative feedback biasing. This invention utilizes a shift register and a multiplexer, controlled by the shift register, to provide the feedback to an amplifier. This improves the correlation between the present data output bit and the following bit.
22 Citations
28 Claims
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1. A randomizer device, having a noise input, a clock input and an output, said randomizer comprising:
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feedback means for producing a feedback signal, said feedback means having an input, a clock input, a first output, a second output and a third output, said clock input being coupled to said clock input of said randomizer device and said third output being coupled to said output of said randomizer device; a comparator having a first input, a second input and an output, said first input being coupled to said noise input of said randomizer means and said output being coupled to said input of said feedback means; and coupling means for coupling said first and second inputs of said comparator providing a balanced DC voltage and reducing the ripple voltage to said comparator, said coupling means having a first input, a second input, a first output and a second output, said first input being coupled to said first output of said feedback means, said second input being coupled to said second output of said feedback means, said first output being coupled to said first input of said comparator and said second output being coupled to said second input of said comparator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of producing a random data signal comprising the steps of:
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providing a noise signal to a randomizer; amplifying said noise signal using a comparator producing an amplified signal; transmitting said amplified signal to a shift register; storing said amplified signal in said shift register making a store signal; transmitting a first portion of said stored signal to a data input of a multiplexer and a second portion of said stored signal to a control input of said multiplexer; selecting an output of said multiplexer using said second portion of said stored signal transmitted to said control input of said multiplexer; and biasing said comparator with said output from said multiplexer.
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23. A randomizer device, having an input, a clock input and an output, comprising:
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a first capacitor having a first connector and a second connector, said first connector being coupled to said input of said randomizer device; a first resistor having a first connector and a second connector, said second connector being coupled to said second connector of said first capacitor; a second resistor having a first connector and a second connector, said second connector being coupled to said first connector of said first resistor; a second capacitor having a first connector and a second connector, said first connector being coupled to said first connector of said first resistor; a third resistor having a first connector and a second connector, said second connector being coupled to said second connector of said second capacitor; a fourth resistor having a first connector and a second connector, said first connector being coupled to said second connector of said second capacitor; a comparator having a first input, a second input and an output, said first input being coupled to said second connector of said first capacitor and said second input being coupled to said second connector of said fourth resistor; a shift register having an input, a clock input, an output, a first bus and a second bus, said input being coupled to said output of said comparator, said clock input being coupled to said clock input of said randomizer and said output being coupled to said output of said randomizer; a multiplexer having a data input, a control input, a first output and a second output, said data input being coupled to said first data bus of said shift register, said control input being coupled to said second data bus of said shift register, said first output being coupled to said first connector of said second resistor and said second output being coupled to said first connector of said third resistor. - View Dependent Claims (24, 25, 26, 27, 28)
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Specification