Coded data generation or conversion – Analog to digital conversion followed by digital to analog...
Patent
1998-11-25
2000-11-28
Young, Brian
Coded data generation or conversion
Analog to digital conversion followed by digital to analog...
341154, 341126, H03M 100
Patent
active
061541575
ABSTRACT:
An analog-to-analog converter uses programmable conversion arrays containing non-volatile memory cells to provide references that depend on the threshold voltages of the memory cells, with the type of conversion dependent on the threshold voltages of the cells. An analog input signal is applied to an analog-to-digital conversion array for conversion to a digital signal. The digital signal is applied to a digital-to-analog conversion array for conversion to an analog output signal. A memory cell in the digital-to-analog conversion array is selected corresponding to the digital signal and reads the memory cell to generate the analog output signal, which is equal to or has a one-to-one correspondence with the threshold voltage of the memory cell. The conversion arrays can be programmed with suitable threshold voltages to implement desired conversions, such as logarithmic conversion for voice applications or random conversions for signal encryption.
REFERENCES:
patent: 5060178 (1991-10-01), Kato et al.
patent: 5986633 (1999-11-01), Takeuchi
patent: 6016113 (2000-01-01), Binder
Kost Jason L W
SanDisk Corporation
Young Brian
LandOfFree
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