GB974499A - A circuit arrangement for producing potentials of given value but of a sign dependent upon received signal combinations - Google Patents
A circuit arrangement for producing potentials of given value but of a sign dependent upon received signal combinationsInfo
- Publication number
- GB974499A GB974499A GB30473/61A GB3047361A GB974499A GB 974499 A GB974499 A GB 974499A GB 30473/61 A GB30473/61 A GB 30473/61A GB 3047361 A GB3047361 A GB 3047361A GB 974499 A GB974499 A GB 974499A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- circuit
- measured
- reference voltage
- stage
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
- H03K19/08—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices
- H03K19/082—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using semiconductor devices using bipolar transistors
- H03K19/0823—Multistate logic
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
- H03M1/74—Simultaneous conversion
- H03M1/78—Simultaneous conversion using ladder network
- H03M1/785—Simultaneous conversion using ladder network using resistors, i.e. R-2R ladders
Abstract
974,499. Analogue to digital converters. TELEFONAKTIEBOLAGET L.M. ERICSSON. Aug. 23, 1961 [Aug. 23, 1960] No. 30473/61. Heading G4H. [Also in Division H3] A plurality of bi-stable circuits (see Division H3) are used in a digital voltmeter. The voltage EA to be measured is applied to one input of a voltage comparator DD together with a reference voltage ER having a value equal to half the maximum value measurable by the circuit. In the presence of a start voltage applied at terminal A of stage A 1 a synchronising pulse applied at the terminal B of stage A 1 will open the gate G1 and switch over a bi-stable circuit V1. In the absence of a further input to the circuit this will change the previously zero voltage at point Y to a value such that the voltage to be measured is increased by an amount equal to the reference voltage. If however the reference voltage was less than the voltage to be measured the comparator DD will apply a voltage to the bi-stable circuit V2 coincident with the synchronizing pulse so that the latter bi-stable circuit also changes over and the voltage applied at terminal Y is such that the reference voltage is subtracted from the voltage to be measured. The operation of bi-stable circuit V1 applies an enabling voltage to gate G1 of stage A 2 so that the next synchronizing pulse at B, in response to a comparison of the reference voltage with the modified voltage to be measured, applies at terminal Y of stage A 2 a voltage such that at the output of network N the voltage to be measured is effectively increased or decreased by an amount equal to half the reference voltage The process of comparison and addition or subtraction from the value to be measured continues along the stages. The circuit can be arranged to give a serial or parallel indication of the digital value of the analogue voltage. Fig. 1 (not shown) illustrates a circuit suitable for unit A 1 A 2 etc. in which bistable circuit V 1 comprises cross coupled similar transistors and bi-stable circuit V 2 comprises two complementary transistors.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE805360A SE181688C1 (en) | 1960-08-23 | 1960-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB974499A true GB974499A (en) | 1964-11-04 |
Family
ID=20273024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30473/61A Expired GB974499A (en) | 1960-08-23 | 1961-08-23 | A circuit arrangement for producing potentials of given value but of a sign dependent upon received signal combinations |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3242348A (en) |
| BE (1) | BE607399A (en) |
| DE (1) | DE1288634B (en) |
| DK (1) | DK108577C (en) |
| GB (1) | GB974499A (en) |
| NL (1) | NL268501A (en) |
| SE (1) | SE181688C1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE331847B (en) * | 1968-10-29 | 1971-01-18 | Ericsson Telefon Ab L M | |
| US3826928A (en) * | 1970-08-11 | 1974-07-30 | Fincor Inc | Variable pulse width generator employing flip-flop in combination with integrator-differentiator network |
| JPH0456519A (en) * | 1990-06-26 | 1992-02-24 | Mitsubishi Electric Corp | A/d converter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB738739A (en) * | 1951-09-15 | 1955-10-19 | Emi Ltd | Improvements relating to electronic binary registers |
| US2824961A (en) * | 1955-03-04 | 1958-02-25 | Burroughs Corp | Decade counter for producing an output at the count of nine |
| US2858432A (en) * | 1955-12-28 | 1958-10-28 | Ibm | Decade counter |
| US2970761A (en) * | 1957-11-04 | 1961-02-07 | Philips Corp | Digit indicator |
| US3020419A (en) * | 1958-07-28 | 1962-02-06 | Gen Dynamics Corp | Pulse frequency dividing system using ring counter and means to cancel some input pulses |
| US3067339A (en) * | 1959-01-15 | 1962-12-04 | Wolfgang J Poppelbaum | Flow gating |
| DE1094497B (en) * | 1959-06-20 | 1960-12-08 | Olympia Werke Ag | Electronic step switch |
-
0
- NL NL268501D patent/NL268501A/xx unknown
-
1960
- 1960-08-23 SE SE805360A patent/SE181688C1/sv unknown
-
1961
- 1961-08-16 DE DET20609A patent/DE1288634B/en active Pending
- 1961-08-22 DK DK337161AA patent/DK108577C/en active
- 1961-08-22 US US133213A patent/US3242348A/en not_active Expired - Lifetime
- 1961-08-22 BE BE607399A patent/BE607399A/en unknown
- 1961-08-23 GB GB30473/61A patent/GB974499A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1288634B (en) | 1969-02-06 |
| NL268501A (en) | 1900-01-01 |
| US3242348A (en) | 1966-03-22 |
| DK108577C (en) | 1968-01-08 |
| SE181688C1 (en) | 1962-11-27 |
| BE607399A (en) | 1961-12-18 |
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