Method and apparatus for converting frequency signals representing characters to binary code
US4636590A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Dec 31, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/515
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A frequency analyzing circuit for converting multifrequencies representing characters into selected signals for writing data into a plurality of channels adapted to effect enabling and disabling signals to a counter having an output code in binary form. Each of the channels is connected to a corresponding selected signal output of the frequency analyzing circuit from which the channel records a signal corresponding to a selected character. A plurality of gates is provided in each channel. The selected data signal read by a channel produces a logic in the gates which activate an enabling output voltage from the channel circuitry which is responsive to the enabling voltage to generate the selected character in binary code and to latch when the binary code character is generated. The enabling output voltage from the actuated channel also generates a sequential pulsing to said channels which when applied to activated channel produces a logic in the gates which deactivates the output voltage and results in the latching of the selected character in binary code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.