EP 0122984 A1 19841031 - Time measuring circuit.
Title (en)
Time measuring circuit.
Title (de)
Zeitmessschaltung.
Title (fr)
Circuit de mesure de temps.
Publication
Application
Priority
EP 83302263 A 19830421
Abstract (en)
A time measuring circuit for meters of the pulse reflection type includes a gate signal generator (3) for producing a gate pulse signal (D) the duration of which is proportional to a value of an object to be measured, an oscillator (1) for producing clock pulses at a predetermined frequency, a complementary-output element (2, 200) responsive to the gate pulse signal for producing first and second clock pulses (G, H) which are the same at their phase and relatively inverted, a pair of gates (4, 5) for passing therethrough the first and second clock pulses during appearance of the gate pulse signal, a flip-flop (6) for applying the first clock pulses to a counter (7) and for applying the first and second clock pulses to a pair of integration circuits (11, 12). The counter (7) counts the first clock pulses (G) to produce an output signal indicative of the counted value, and the integration circuits (11, 12) selectively integrate the first and second clock pulses (G, H) in response to the gate pulse signal. An analog-to-digital converter (13) is connected to the integration circuits to convert the finally integrated value into a digital value, and a computer (14) is arranged to calculate a sum of the counted value and the digital value.
IPC 1-7
IPC 8 full level
G04F 10/00 (2006.01)
CPC (source: EP)
G04F 10/00 (2013.01)
Citation (search report)
- [A] US 4112358 A 19780905 - ASHIDA HITOSHI
- [X] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 4, no. 5, October 1961, New York (US)
- [Y] IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, vol. IM-21, no. 4, November 1972
Designated contracting state (EPC)
DE GB SE
DOCDB simple family (publication)
EP 0122984 A1 19841031; EP 0122984 B1 19880817; DE 3377748 D1 19880922
DOCDB simple family (application)
EP 83302263 A 19830421; DE 3377748 T 19830421