Apparatus and method for converting a multi-bit signal to a serial pulse stream
US6781435B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2003 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Feb 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for converting an n-bit number to a serial stream of single-bit pulses includes circuitry for generating n different sets of pulses; each set of pulses corresponding to a bit of the n-bit binary number; the number of pulses in a set of pulses corresponding to a bit “j” being equal to 2(j−1) pulses, where “j” is an integer which varies from one (1) for the LSB to n for the MSB. The circuit also includes n switches each switch having an input port, an output port and a control port. Each different bit is applied to the control port of a switch and the set of pulses corresponding to the bit is applied to the control port of that switch. The output ports of the n switches are coupled to a common point for combining the signals at the output ports and producing a serial stream of single-bit pulses at the common point which is equivalent to the n-bit binary number. A shift register capable of storing 2n−1 pulses may be connected to the common point and digital to analog circuitry may be connected to the output of the shift register for producing an analog voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.