Asynchronous superconductor serial multiply-accumulator
US6388600B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Nov 13, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/60
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator/multiply-accumulator AID converter (100) which simultaneously provides frequency downconversion, band pass filtering and analog-to-digital conversion of an analog signal, where the analog signal includes a carrier wave modulated with information by any known modulation technique. The converter (100) uses a superconducting, Josephson single flux quantum circuit operating as a voltage controlled oscillator (102). The voltage controlled oscillator (102) receives the analog signal to be converted, and generates a series of sharp, high frequency pulses based on the characteristics of the carrier signal. The series of pulses are applied to a gate circuit (104) that either passes or blocks the pulses depending on a gate control signal (103). When the pulses are passed by the gate circuit (104), a multiply-accumulator (106) multiplies the pulse by a binary coefficient (109) and accumulates the products (111) resulting from the multiplication during a predetermined time period. The predetermined time period includes at least one sampling period. Each sample is multiplied by a different weight and their products (111) are accumulated. This operation eliminates the DC response, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.