US5014059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog-to-digital converter system
Assignee: Tektronix Inc
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Filing: 1990-03-01
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Granted: 1991-05-07
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Expires: 2010-03-01
Abstract
Abstract A serial-to-parallel analog CCD GaAs device provides high speed A/D or D/A conversion. A high speed analog signal is sampled by shifting the analog data serially into "n" CCD elements. Then a parallel load pulse transfers the analog data into multiple CCD holding elements. A bank of A/D converters converts the analog data. Conversely, the outputs of a bank of D/A converters are loaded in parallel into a serial CCD device of "n" elements. The serial CCD device is shifted out serially to complete the conversion to an analog signal.
Inventors
- 👤 Michael C. Seckora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:44
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/662; H03M1/12; H03M1/1205; H03M1/121; H03M1/1215
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
187 words
An analog-to-digital conversion system including a storage device adapted for converting signal formats, comprising: a plurality of first storage elements connected together to form a first linear array and operative for receiving an analog signal and continually shifting the analog signal along the array in accordance with sequences of clock pulses; a plurality of second storage elements arranged in a second linear array and operative for holding discrete analog data transferred in parallel at end of each sequence of clock pulses from the first storage elements, the second storage elements having parallel output conductors and each of the second storage elements providing on its output conductor a discrete analog datum not held by any other of the second storage elements; and a plurality of multiple bit analog-to-digital converters each one of which is coupled to a different one of said parallel outputs of the second storage elements and which are operative for concurrently converting the discrete analog data into digital data, each datum of the digital data representing a multiple bit digital weighted value of a discrete analog datum held by one of the second storage elements.
Claim 2
Dependent Claim
187 words
An analog-to-digital conversion system including a storage device adapted for converting signal formats, comprising: a plurality of first storage elements connected together to form a first linear array and operative for receiving an analog signal and continually shifting the analog signal along the array in accordance with sequences of clock pulses; a plurality of second storage elements arranged in a second linear array and operative for holding discrete analog data transferred in parallel at end of each sequence of clock pulses from the first storage elements, the second storage elements having parallel output conductors and each of the second storage elements providing on its output conductor a discrete analog datum not held by any other of the second storage elements; and a plurality of multiple bit analog-to-digital converters each one of which is coupled to a different one of said parallel outputs of the second storage elements and which are operative for concurrently converting the discrete analog data into digital data, each datum of the digital data representing a multiple bit digital weighted value of a discrete analog datum held by one of the second storage elements.
Claim 3
Dependent Claim
67 words
The system of claim 1, further including: a plurality of buffer means one of which is coupled between each of the second storage elements and the analog-to-digital converter to which it is coupled for isolating the second storage elements from external disturbances; and amplifier means coupled between the array of first storage elements and the conductor for buffering the storage elements with respect to the analog signal.
Claim 4
Dependent Claim
45 words
The system of claim 1, further including a plurality of correction means one of which is coupled to each of the analog-to-digital converters for adjusting the data passing through each of the converters in order to compensate for errors in the operation of the system.
Claim 5
Dependent Claim
20 words
The system of claim 1, in which the first and second storage elements are of the sample and hold type.
Claim 6
Dependent Claim
16 words
The system of claim 4, in which the first and second storage elements comprise charge-coupled devices.
Claim 7
Dependent Claim
195 words
In an apparatus including a storage device having an array of rows and columns, a process comprising the steps of: continuously shifting an analog signal across one row of the array along a first set of storage elements; periodically loading discrete analog data signals representing samples of the analog signal in parallel down a set of columns in the array from the first set of storage elements into a second set of storage elements for holding said discrete analog data signals, each one of the second set of storage elements having a parallel output conductor; transmitting the discrete analog data signals in parallel from the parallel output conductors of the second set of storage elements to a set of multiple bit A/D converters, each storage element in the second set providing on its output conductor a discrete analog data signal not held by any other of the second storage elements; and converting the discrete analog data signals into digital data through the use of the A/D converters, each datum of the digital data representing a multiple bit digital weighted value of a discrete analog datum signal held by one storage element in the second set.
Claim 8
Dependent Claim
195 words
In an apparatus including a storage device having an array of rows and columns, a process comprising the steps of: continuously shifting an analog signal across one row of the array along a first set of storage elements; periodically loading discrete analog data signals representing samples of the analog signal in parallel down a set of columns in the array from the first set of storage elements into a second set of storage elements for holding said discrete analog data signals, each one of the second set of storage elements having a parallel output conductor; transmitting the discrete analog data signals in parallel from the parallel output conductors of the second set of storage elements to a set of multiple bit A/D converters, each storage element in the second set providing on its output conductor a discrete analog data signal not held by any other of the second storage elements; and converting the discrete analog data signals into digital data through the use of the A/D converters, each datum of the digital data representing a multiple bit digital weighted value of a discrete analog datum signal held by one storage element in the second set.
Claim 9
Dependent Claim
26 words
The process of claim 6, further including the steps of: adjusting the digital data to compensate for errors in the shifting, loading, transmitting, and converting steps.
Claim 10
Dependent Claim
29 words
The method of claim 6, further including the step of buffering the discrete analog data signals from the second set of storage elements to the set of A/D converters.
Claim 11
Dependent Claim
22 words
The process of claim 6, in which the first and second sets of storage elements are of the sample and hold type.
Claim 12
Dependent Claim
18 words
The process of claim 9, in which the first and second sets of storage elements comprise charge-coupled devices.
References Cited (Backward Citations)
US3763480A
Cited
US3820112A
Cited
US3958210A
Cited
US4099175A
Cited
US4353057A
Cited
US4329679A
Cited
US4458324A
Cited
US4464726A
Cited
US4471341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |