Method of converting a pulse train of electrical signals into digital signals
US4651102A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Nov 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of converting a pulse train of electrical signals having a frequency within a known frequency range into digital signals is shown. The method comprises the steps of deriving with a phase-locked loop the frequency of the electrical signals and producing clock pulses at a frequency which is a preselected integer of the electrical signals frequency; deriving an analog input signal from the electrical signals; receiving and counting clock pulses with a pulse scaling circuit for producing count enabling signals; detecting with a peak detecting circuit having a comparator receives as inputs the analog input signal and a analog output signal voltage and an output coupled to and enabling the pulse scaling circuit; producing with a digital counting circuit which is responsive to count enabling signals by changing count direction discrete digital output signals which are stored in a latch register at the time the digital counting circuit changes its count direction; applying the discrete digital output signals to a digital-to-analog converter which produces the analog output signal voltage; and comparing with the comparator the analog input signal with the analog output signal volta…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.