Patent US4146750A successfully refreshed from Google Patents.
US4146750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog multiplexer control circuit
Assignee: Honeywell Inc
•
Filing: 1977-12-29
•
Granted: 1979-03-27
•
Expires: 1997-12-29
Abstract
Abstract An improved multiplexer circuit features an addressing arrangement for effecting the selection, first, of the particular multiplexing module, then of an individual input from among the several inputs to the module. To this end, a latch assembly is provided for storing the address of the individual input to the module. Gating structure is provided, responsive to an address code for enabling the latch assembly to store the applied address code. An output switch is connected in the output circuit of the multiplexer module and operatively controlled by the selecting circuit to block any spurious output from the multiplexer module when the particular multiplexer is not selected.
Inventors
- 👤 Robert L. Spiesman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:00
CPC Classifications
H; H04; H04Q; H04Q9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
206 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means also including latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module; signal responsive solid state switch means connected serially to said output terminals of said multiplexer module; and means connecting the output of said last mentioned latch means of said latch assembly means to said solid state switch means to control the operation thereof.
Claim 2
Dependent Claim
206 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means also including latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module; signal responsive solid state switch means connected serially to said output terminals of said multiplexer module; and means connecting the output of said last mentioned latch means of said latch assembly means to said solid state switch means to control the operation thereof.
Claim 3
Dependent Claim
236 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means having output means for said stored address signals and means connecting said input selection control terminals of said multiplexer module to said latch assembly output means; said latch assembly means also including latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module; signal responsive solid state switch means connected serially to said output terminals of said multiplexer module; and means connecting the output of said last mentioned latch means of said latch assembly means to said solid state switch means to control the operation thereof.
Claim 4
Dependent Claim
236 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means having output means for said stored address signals and means connecting said input selection control terminals of said multiplexer module to said latch assembly output means; said latch assembly means also including latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module; signal responsive solid state switch means connected serially to said output terminals of said multiplexer module; and means connecting the output of said last mentioned latch means of said latch assembly means to said solid state switch means to control the operation thereof.
Claim 5
Dependent Claim
191 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means having output means for said stored address signals and means connecting said output means to said input selection control terminals of said multiplexer module; said latch assembly means also including latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module.
Claim 6
Dependent Claim
191 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means having output means for said stored address signals and means connecting said output means to said input selection control terminals of said multiplexer module; said latch assembly means also including latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module.
Claim 7
Dependent Claim
220 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means having output means for said stored address signals and means connecting said output means to said input selection control terminals of said multiplexer module; said latch assembly means also including further latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module; and output circuit means including further gating means connecting an output for said stored further address and control signal to an "enable" input terminal on said multiplexer module.
Claim 8
Dependent Claim
220 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means having output means for said stored address signals and means connecting said output means to said input selection control terminals of said multiplexer module; said latch assembly means also including further latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module; and output circuit means including further gating means connecting an output for said stored further address and control signal to an "enable" input terminal on said multiplexer module.
Claim 9
Dependent Claim
25 words
A multiplexer control circuit as set forth in claim 4 wherein said further gating means is enabled by an external signal from said computer means.
Claim 10
Dependent Claim
262 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means having output means for said stored address signals and means connecting said output means to said input selection control terminals of said multiplexer module; said latch assembly means also including further latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module, output circuit means including further gating means connecting an output for said stored further address and control signals to an "enable" input terminal on said multiplexer module; signal responsive solid state switch means connected serially to said output terminals of said multiplexer module; and means connecting the output of said last mentioned latch means of said latch assembly means to said solid state switch means to control the operation thereof.
Claim 11
Dependent Claim
262 words
A digital computer based process control system including an analog input multiplexer control circuit and digital computer means for supplying digital control signals to said multiplexer control circuit, said multiplexer control circuit comprising: a selectively controlled multiplexer module having a plurality of pairs of analog signal input terminals, a single pair of analog signal output terminals, and signal responsive input selection control terminals; digital signal responsive logic control means for controlling the operation of said multiplexer module; said logic control means including a latch assembly means for storing address signals received from said computer means and signal responsive gating means for controlling the operation of said latch assembly means; said gating means being responsive to further address and control signals from said computer means to provide control signals for said latch assembly means; said latch assembly means having output means for said stored address signals and means connecting said output means to said input selection control terminals of said multiplexer module; said latch assembly means also including further latch means for storing a signal derived from said further address and control signals to provide a controlled "enable" signal for said multiplexer module, output circuit means including further gating means connecting an output for said stored further address and control signals to an "enable" input terminal on said multiplexer module; signal responsive solid state switch means connected serially to said output terminals of said multiplexer module; and means connecting the output of said last mentioned latch means of said latch assembly means to said solid state switch means to control the operation thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |