EP0474025A2
Expired / Lapsed
EP
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Automatic A/D converter operation using programmable sample time
Assignee: Motorola Solutions Inc
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Filing: 1991-08-21
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Granted: —
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Expires: 2011-08-21
Abstract
Abstract An analog-to-digital conversion system module and method provides programmable times for sampling analog input signals (21, 22, FIG. 2). Software involvement is minimized by providing a command word (FIG. 7) which includes information specifying a sample time (IST). The command word may be stored in a register or memory table (62, FIG. 2). The command word or words may specify the conversion time per analog input channel or group of channels, and per conversion or conversion sequence. In one embodiment a control table comprises a plurality of conversion command words (CCW's). Each CCW designates conversion parameters including the input sample time.
Inventors
- 👤 Jules Desloge Campbell, Jr.
- 👤 William Dewitt Huston
- 👤 Mark Richard Heene
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 15:34
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/124; H03M1/1245; H03M1/34; H03M1/38; H03M1/46; G; G06; G06F; G06F3/00; G06F3/05; H03M1/1205; H03M1/122; H03M1/1225
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
An analog-to-digital conversion system comprising: (a) an analog-to-digital converter (52, FIG. 2); (b) at least one analog input terminal (21, 22); (c) means for reading (60) at least one command word (FIG. 7), said command word designating an input sample time (IST); (d) means responsive to said reading means for sampling an analog signal on said at least one analog input terminal for the duration of said input sample time (40, 42, FIG. 2); and (e) means responsive to said sampling means for converting the sampled value of said analog signal into a digital value (52, FIG. 2).
Claim 2
Dependent Claim
30 words
The analog-to-digital conversion system recited in claim 1 and comprising a plurality of analog input terminals (21, 22), wherein said input sample time is specified for each of said terminals.
Claim 3
Dependent Claim
31 words
The analog-to-digital conversion system recited in claim 1 and comprising a plurality of analog input terminals (21, 22), wherein a single input sample time is specified for said plurality said terminals.
Claim 4
Dependent Claim
112 words
An analog-to-digital conversion system comprising: (a) an analog-to-digital converter (52, FIG. 2); (b) at least one analog input terminal (21, 22); (c) means for reading (60) at least one command word (FIG. 7), said command word designating an input sample time (IST); (d) means responsive to said reading means for sampling an analog signal on said at least one analog input terminal for the duration of said input sample time (40, 42, FIG. 2); (e) means responsive to said sampling means for converting the sampled value of said analog signal into a digital value (52, FIG. 2); and (f) means for repeating said sampling a predetermined number of times (81, FIG. 5).
Claim 5
Dependent Claim
19 words
The analog-to-digital conversion system recited in claim 4, wherein the same input sample time is used for each sampling.
Claim 6
Dependent Claim
18 words
The analog-to-digital conversion system recited in claim 4, wherein an input sample time is specified for each sampling.
Claim 7
Dependent Claim
34 words
The analog-to-digital conversion system recited in claim 4 and comprising a plurality of analog input terminals (21, 22), wherein said input sample time is specified for each successive sampling for each of said terminals.
Claim 8
Dependent Claim
37 words
The analog-to-digital conversion system recited in claim 4 and comprising a plurality of analog input terminals (21, 22), wherein said input sample time is specified for each successive sampling of said plurality of terminals as a whole.
Claim 9
Dependent Claim
38 words
The analog-to-digital conversion system recited in claim 4 and comprising a plurality of analog input terminals (21, 22), wherein the same input sample time is specified for each successive sampling of said plurality of terminals as a whole.
Claim 10
Dependent Claim
24 words
The analog-to-digital conversion system recited in claim 4, wherein said converting means converts each sampled value of said analog signal into a digital value.
Claim 11
Dependent Claim
20 words
The analog-to-digital conversion system recited in claims 1 or 4, wherein said analog-to-digital conversion system is on an integrated circuit.
Claim 12
Independent Claim
136 words
A method of converting an analog signal into a digital signal, said method utilizing a conversion system comprising an analog-to-digital converter (52, FIG. 2), at least one analog input terminal (21, 22), means for reading (240, FIG. 3) at least one command word (FIG. 7), said command word comprising information designating an input sample time (IST), means for sampling an analog signal on said at least one analog input terminal (40, 42, FIG. 2), and means for converting the sampled value of said analog signal into a digital value (52, FIG. 2), said method comprising the steps of: (a) reading said at least one command word; and (b) responsive to said at least one command word, sampling an analog signal on said at least one analog input terminal for the duration of said input sample time.
References Cited (Backward Citations)
No citation records indexed.
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