Analog-to-digital converter operable with staggered timing
First Claim
1. An analog-to-digital converter arrangement, comprising:
- an analog-to-digital converter for converting an input signal (XIN) into a digital outout signal, said analog-to-digital converter operating with staggered timing and comprising a converter array having a plurality of individual analog-to-digital converters (15-1 to 5-4) being arranged in a fixed sequence in parallel with one another and operable with staggered timing with respect to one another; and
a connection network configured to generate, for a staggered timing actuation, a control signal for each of said individual analog-to-digital converters (CLKI′
-CLK4′
), said connection network predefining a time sequence with which said control signals (CLKI′
-CLK4′
) actuate said individual analog-to-digital converters in such a way that owing to said sequence and thus the sequence of said actuated individual analog-to-digital converters there is at least a reduction in an interference spectrum in the spectrum of said digital output signal (XIN, XOUT);
wherein said connection network comprises a counter being triggered by a central clock signal (CLK) and generating a counter sequence (Z1), and wherein each of said individual analog-to-digital converters comprises connected upstream on the control side at least one actuation circuit which assigns a counter reading of the counter sequence generated by the counter to each individual analog-to-digital converter, in each case as a control signal (CLK1′
-CLK4′
).
1 Assignment
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Accused Products
Abstract
An arrangement for a time interleaved analog-to-digital converter that converts an signal to a digital signal and has a converter array with a plurality of analog-to-digital converters arranged in a fixed sequence in parallel with one another and can be operated with staggered timing with respect to one another is disclosed. The arrangement has a connection network which, for the purposes of actuation with staggered timing, generates in each case one control signal for an individual analog-to-digital converter in each case, with the connection network predefining the time sequence with which the control signals actuate the individual analog-to-digital converters in such a way that owing to this sequence of the control signals and thus the sequence of the actuated individual analog-to-digital converters there is at least a reduction in an interference spectrum in the spectrum of the input and/or output signal. A sorting method for operating this analog-to-digital converter is also disclosed.
28 Citations
19 Claims
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1. An analog-to-digital converter arrangement, comprising:
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an analog-to-digital converter for converting an input signal (XIN) into a digital outout signal, said analog-to-digital converter operating with staggered timing and comprising a converter array having a plurality of individual analog-to-digital converters (15-1 to 5-4) being arranged in a fixed sequence in parallel with one another and operable with staggered timing with respect to one another; and a connection network configured to generate, for a staggered timing actuation, a control signal for each of said individual analog-to-digital converters (CLKI′
-CLK4′
), said connection network predefining a time sequence with which said control signals (CLKI′
-CLK4′
) actuate said individual analog-to-digital converters in such a way that owing to said sequence and thus the sequence of said actuated individual analog-to-digital converters there is at least a reduction in an interference spectrum in the spectrum of said digital output signal (XIN, XOUT);wherein said connection network comprises a counter being triggered by a central clock signal (CLK) and generating a counter sequence (Z1), and wherein each of said individual analog-to-digital converters comprises connected upstream on the control side at least one actuation circuit which assigns a counter reading of the counter sequence generated by the counter to each individual analog-to-digital converter, in each case as a control signal (CLK1′
-CLK4′
). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A analog-to-digital converter comprising:
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an analog-to-digital converter for converting an input signal (XIN) into a digital outout signal, said analog-to-digital converter operating with staggered timing and comprising a converter array having a plurality of individual analog-to-digital converters (15-1 to 5-4) being arranged in a fixed sequence in parallel with one another and operable with staggered timing with respect to one another; a connection network configured to generate, for a staggered timing actuation, a control signal for each of said individual analog-to-digital converters (CLKI′
-CLK4′
), said connection network predefining a time sequence with which said control signals (CLKI′
-CLK4′
) actuate said individual analog-to-digital converters in such a way that owing to said sequence and thus the sequence of said actuated individual analog-to-digital converters there is at least a reduction in an interference spectrum in the spectrum of said digital output signal (XIN, XOUT);a measuring device having a measuring output, said measuring device determining at least one of the properties of said individual analog-to-digital converters or the parameters which influence said spectrum and providing, at said measuring output, a respective measurement signal; and an evaluation device evaluates a measurement signal (M1) of the measuring device and generates, as a function of this evaluation, setting signals (E1) four actuating and setting in an optimum way the connections of the connection network.
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13. An analog-to-digital converter arrangement comprising an analog-to-digital converter for converting an input signal (XIN) into a digital output signal, said analog-to-digital converter operating with staggered timing and comprising a converter array having a plurality of individual analog-to-digital converters (15-1 to 15-4) being arranged in a fixed sequence in parallel with one another and operable with staggered timing with respect to one another;
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a connection network configured to generate, for a staggered timing actuation, a control signal for each of said individual analog-to-digital converters (CLKI′
-CLK4′
), said connection network predefining a time sequence with which said control signals (CLKI′
-CLK4′
) actuate said individual analog-to-digital converters in such a way that owing to said sequence and thus the sequence of said actuated individual analog-to-digital converters there is at least a reduction in an interference spectrum in the spectrum of said digital output signal (XIN, XOUT); anda first group of individual analog-to-digital converters is provided in which the sequence of the individual analog-to-digital converters is assigned in accordance with a reduction in an interference spectrum in the spectrum (PS) of the input signal (XTN) and/or output signal (XOUT), and at least a second group of individual analog-to-digital converters is provided in which an assignment of the sequence of the individual analog-to-digital converters is provided.
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14. A sorting method for operating a converter arrangement for spectral shaping of the spectrum of an output signal (XOUT), comprising the steps:
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(a) a providing a converter array having a plurality of individual analog-to-digital converters are arranged in a fixed sequence and in parallel with one another; (b) determining at least a parameter for an optimum sequence of the individual analog-to-digital converters within the converter array; (c) assigning a sequence of the individual analog-to-digital converters with which they are actuated with staggered timing accordance with the determined narameter or parameters; and wherein a first group and at least a second group of individual analog-to-digital converters are provided, with alternate individual analog-to-digital converters of the first group and of the second group being selected for a determination of an optimized sequence of the individual analog-to-digital converters, and in that the selection of an individual analog-to-digital converter is carried out randomly within a respective group. - View Dependent Claims (15, 16, 17)
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18. A sorting method for operating a converter arrangement for spectral shaping of the spectrum of an output signal (XOUT), comprising the steps:
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(a) providing a converter array having a plurality of individual analog-to-digital converters are arranged in a fixed sequence and in parallel with one another; (b) determining at least a parameter for an optimum sequence of the individual analog-to-digital converters within the converter array; (c) assigning a sequence of the individual analog-to-digital converters with which they are actuated with staggered timing accordance with the determined parameter or parameters; and further characterized in that a plurality of groups of optimized sequences are made available for the individual analog-to-digital converters of a converter array, with a new group for the successive conversion cycle or cycles being selected randomly after a predetermined number of conversion cycles, in particular after each conversion cycle.
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19. A sorting method for operating a converter arrangement for spectral shaping of the spectrum of an output signal (XOUT), comorising the steps:
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(a) providing a converter array having a plurality of individual analog-to-digital converters are arranged in a fixed sequence and in parallel with one another; (b) determining at least a parameter for an optimum sequence of the individual analog-to-digital converters within the converter array; and (c) assigning a sequence of the individual analog-to-digital converters with which they are actuated with staggered timing accordance with the determined parameter or parameters; and wherein at least a first group of individual analog-to-digital converters is provided, with the sequence of the individual analog-to-digital, converters being assigned in accordance with the determined sequence, in accordance with a reduction in an interference spectrum in the spectrum of the input signal (XIN) and/or output signal (XOUT), and at least a second group of individual analog-to-digital converters is provided in which the sequence of the individual analog-to-digital converters is assigned according to the randomization method.
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Specification