Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1988-08-01
1990-04-03
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328 27, 307529, H03B 1900
Patent
active
049143972
ABSTRACT:
A digital frequency up conversion arrangement comprising a source of fixed high speed clock pulses the frequency of which is near to the desired output frequency of the converter arrangement, a high frequency counter to which the clock pulses are applied to produce a repetitive fixed m-bit digital word in parallel output form, the sample rate of the m-bit word being equal to the high speed clock frequency, divider to which the high speed clock pulses are applied to form a slow clock pulse train, a slow frequency NCO to which the slow clock train is applied together with frequency control signals to produce m-bit words the sample rate of which is equal to the slow clock frequency, summing means to which the high sample rate and slow sample rate m-bit words are applied to produce resultant m-bit words which form a digital representation of a sine wave at the required output frequency, and digital-to-analog conversion means to which the resultant m-bit words are applied to produce an analog sine wave at the required output frequency.
REFERENCES:
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patent: 4443767 (1984-04-01), Reichert et al.
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patent: 4492936 (1985-01-01), Albarello et al.
patent: 4636734 (1987-01-01), Genrich
patent: 4758737 (1988-07-01), Hirano
Gale Simon J.
Moroz Stephen M.
Cunningham Terry
Miller Stanley D.
STC PLC
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