GB820406A - Improvements in or relating to digital-to-analogue conversion and control apparatus - Google Patents
Improvements in or relating to digital-to-analogue conversion and control apparatusInfo
- Publication number
- GB820406A GB820406A GB18588/56A GB1858856A GB820406A GB 820406 A GB820406 A GB 820406A GB 18588/56 A GB18588/56 A GB 18588/56A GB 1858856 A GB1858856 A GB 1858856A GB 820406 A GB820406 A GB 820406A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- pulse train
- data
- reference pulse
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000006243 chemical reaction Methods 0.000 title 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
- G05B19/33—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an analogue measuring device
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/41—Servomotor, servo controller till figures
- G05B2219/41461—Phase counter and phase discriminator, phase locked motion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/10—Calibration or testing
- H03M1/1009—Calibration
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Theoretical Computer Science (AREA)
- Inverter Devices (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
820,406. Electric selective signalling systems. GIDDINGS & LEWIS MACHINE TOOL CO. June 15, 1956 [June 23, 1955], No. 18588/56. Class 40 (1). In a digital-to-analogue converter, data is read from a punched tele-type record tape, staticized on electromagnetic relays and converted into a form in which it is represented by the phase difference between two constant-frequency pulse trains. The converter shown in Fig. 1 handles five individual channels of data, each channel, for example channel 1, comprising a frequency-divider FD1 (8 cascaded flip-flops), receiving pulses from a reference pulse generator 10 via an input gate G1 and producing a squarewave pulse train, as shown, which, when it represents no data, is in phase with, and identical to, a reference pulse train produced from pulses from the reference pulse generator by a frequency-divider 12 identical to that used in each data channel. Thus each generated square pulse is " up " for a period of 256 reference pulses from the reference pulse generator and then down for 256 reference pulses. The output pulse train from channel 1 can be made either to lead the reference pulse train-to represent positive data-by feeding extra pulses, interleaved with the reference pulses, to the frequency divider FD1 via a lead 34, or to lag behind the reference pulse train by stopping some of the pulses from the reference pulse generator reaching the frequency-divider. This is done by a pulse deleting circuit PD1, which, under the control of pulses on line 36, closes the gate G1 at the appropriate times. Thus, if, for example, six pulses are entered on line 34 then the output pulse train from channel 1 will lead the reference pulse train by six reference pulses and if six pulses are entered on line 36 then it will lag behind the reference pulse train by six reference pulses. The pulses on the lines 34 and 36 are obtained from the data read from the punched tape.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US353558XA | 1955-06-23 | 1955-06-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB820406A true GB820406A (en) | 1959-09-23 |
Family
ID=21882166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18588/56A Expired GB820406A (en) | 1955-06-23 | 1956-06-15 | Improvements in or relating to digital-to-analogue conversion and control apparatus |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH353558A (en) |
| DE (1) | DE1095013B (en) |
| GB (1) | GB820406A (en) |
-
1956
- 1956-06-15 GB GB18588/56A patent/GB820406A/en not_active Expired
- 1956-06-22 CH CH353558D patent/CH353558A/en unknown
- 1956-06-22 DE DER19116A patent/DE1095013B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1095013B (en) | 1960-12-15 |
| CH353558A (en) | 1961-04-15 |
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