Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Reexamination Certificate
2006-11-08
2010-06-01
Jeanglaude, Jean B (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
C341S155000, C341S156000
Reexamination Certificate
active
07728754
ABSTRACT:
An integrating analog to digital converter (ADC) is disclosed that comprises a Delay Locked Loop (DLL) (2, 50) which is synchronized to a reference clock signal (12). A rising edge of a clock signal therefore propagates through the DLL once each clock cycle. In use, the integrating ADC converts an analog input signal to a digital output signal dependent upon a timing measurement of an integration carried out by an integrator (4). The timing measurement is taken by reading the logical states of the individual delay cells in the DLL. This enables the position of the rising edges of the clock signal to be determined and used as a timing measurement. The timing measurement is in the form of a digital thermometer code that can be converted into a binary number.
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Furtner Wolfgang
Gerfers Friedel
Jeanglaude Jean B
NXP B.V.
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