Memory system having servo compensation
First Claim
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1. A memory system comprising:
- an analog memory for storing analog signals;
an input circuit for storing the analog signals in said analog memory at a first data rate;
an output circuit for outputting the analog signals from said analog memory at a second data rate that is lower than said first data rate;
a servo for generating refreshed output analog signals in response to the analog signals output with said output circuit; and
an analog to digital converter for generating digital output signals in response to the refreshed output analog signals generated with said servo.
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Abstract
The present invention is directed to a servo system for compensation of memory signals. In a preferred embodiment, the memory system is a CCD analog read only memory system. In alternate embodiments, the memory system may include an alterable memory, a bubble memory, and/or other memories. Adaptive servo compensation is provided by storing reference signals and compensating stored information signals with the stored reference signals using a compensation servo arrangement. The servo may be an implicit servo for compensating signal amplitude such as to correct charge transfer errors in a CCD memory.
40 Citations
35 Claims
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1. A memory system comprising:
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an analog memory for storing analog signals; an input circuit for storing the analog signals in said analog memory at a first data rate; an output circuit for outputting the analog signals from said analog memory at a second data rate that is lower than said first data rate; a servo for generating refreshed output analog signals in response to the analog signals output with said output circuit; and an analog to digital converter for generating digital output signals in response to the refreshed output analog signals generated with said servo. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A memory system comprising:
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a memory for storing signals and a plurality of servos for refreshing the signals stored in said memory, wherein said plurality of servos includes a first plurality of bias refresh circuits for bias compensating signals stored in said memory and a second plurality of scale factor refresh circuits for scale factor compensating signals stored in said memory. - View Dependent Claims (21, 22)
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23. A memory system comprising:
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a digital computer for processing digital information; a digital to analog converter for generating an analog information signal in response to digital information processed with said digital computer; an analog memory for storing analog information generated with said digital to analog converter; and a servo for refreshing the analog information stored in said analog memory.
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24. A reverberation system comprising:
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a memory for storing electrical signals; a servo for generating a refreshed signal in response to electrical signals stored in said memory; and reverberation means for providing reverberation in response to the refreshed signal. - View Dependent Claims (27)
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25. A memory system comprising:
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a memory for storing electrical signals and a servo for generating a refreshed signal in response to electrical signals stored in said memory, wherein said servo includes a differential circuit for providing a differential signal in response to an electrical signal stored in said memory to generate a refreshed signal having reduced differential error.
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26. A memory system comprising:
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an analog memory for storing analog signals; an analog refresh circuit for refreshing the analog signals stored in said analog memory at a refresh rate; an analog output circuit for outputting the analog signals stored in said analog memory at an output rate; and a rate circuit for controlling signal rates;
wherein said rate circuit includesa. refresh rate means for generating a refresh rate to control said analog refresh circuit and b. output rate means for generating an output rate to control said analog output circuit, wherein the refresh rate is different from the output rate.
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28. A memory system comprising:
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an analog memory for storing analog signals; a refresh circuit for refreshing the analog signals stored in said analog memory, wherein said refresh circuit includes a differential amplifier for bias refreshing the analog signals stored in said analog memory and a transistor connected in a common leg of said differential amplifier for scale factor refreshing the analog signals stored in said analog memory.
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29. A memory system comprising:
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a memory for storing signals; a reference circuit for generating a reference signal; a comparator for generating a comparison signal in response to a comparison of the stored signals from said memory and the reference signal from said reference circuit. - View Dependent Claims (30, 31)
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32. An analog memory system comprising:
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reference input means for generating an analog reference signal; memory storing means for storing an analog signal; and memory output means for generating an analog memory output signal in response to a comparison between the analog signal stored in said memory storing means and the analog reference signal generated with said reference input means.
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33. A memory system comprising:
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an analog memory for storing analog signals a reference circuit for generating a reference signal; a comparator for comparing the analog signals stored in said analog memory with the reference signal generated with said reference circuit; and an analog to digital converter for converting analog signals stored in said analog memory to digital output signals in response to a comparison between the analog signals stored in said analog memory and the reference signal generated with said reference circuit determined by said comparator. - View Dependent Claims (34)
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35. A memory system for storing electrical signals;
- said memory system comprising;
memory means for storing a plurality of analog signals as stored electrical analog signals; shifting means for shifting the stored electrical analog signals; analog data refresh means for processing the electrical analog signals from said shifting means, said analog data refresh means including reference means for generating an analog reference signals and a servo for processing the electrical analog signals from said shifting means in response to the analog reference signals and analog-to-digital converter means for generating digital output signals in response to the processed electrical analog signals from said analog data refresh means.
- said memory system comprising;
Specification