Method and apparatus for direct analog to formatted digital number conversion

Apparatus for converting an analog signal into digital residue number format, said digital residue format comprising a plurality of digital residues each corresponding to one of a plurality of preselected residue bases, comprising:

• a plurality of residue channels each generating a digital residue corresponding to one of said preselected residue bases, each of said residue channels comprising:
• a plurality of variable frequency oscillators each connected to receive a item-sample of said analog signal, each of said oscillators generating a frequency signal having a frequency that is a function of the amplitude of said time-sample,
• a plurality of delay lines each connected to receive one of said frequency signals, each of said delay lines producing at least one time-delayed signal with a phase shift, relative to said frequency signal, that corresponds to the amplitude of said time-sample represented as a residue for said one preselected residue base, and
• a phase detector connected to receive said time-delayed signals, said phase detector generating a digital residue format corresponding to said one preselected residue base.

Apparatus for converting an along signal into digital residue number format, said digital residue format comprising a plurality of digital residues each corresponding to one of a plurality of respected residue bases, comprising:

• sample and hold circuitry connected to receive said analog signal, said sample and hold circuitry generating a time-sample of said analog signal,
• summation circuitry connected to receive said time-sample, said summation circuitry processing said time-sample with a reference voltage to produce a plurality of summation signals each corresponding to either a sum of the amplitudes of said time-sample and said reference voltage or a difference in the amplitudes of said time-sample and said reference voltage,
• a plurality of phase-locked, variable frequency oscillators each connected to receive one of said summation signals, each of said oscillators generating a frequency signal having a frequency that is a function of the amplitude of said time-sample,
• first mixing and filtering circuitry connected to receive each of said frequency signals, said first mixing and filtering circuitry generating a single reference frequency signal that is a function o the amplitude of said time-sample, and
• a plurality of residue channels each generating a digital residue corresponding to one of said preselected residue bases, each of said residue channels comprising:
• a plurality of delay lines each connected to receive on of said frequency signals, each of said delay lines producing at least one time-delayed signal with a phase shift, relative to said reference frequency signal, that corresponds to the amplitude of said time-sample represented as a residue for said one preselected residue base,
• second mixing and filtering circuitry connected to receive each of said time-delayed signals, said second mixing and filtering circuitry generating a single time-delayed signal with a phase shift, relative to said reference frequency signal, that corresponds to the amplitude of said time-sample represented as a residue for said one preselected residue base,
• a phase detector connected to receive said time-delayed signal and said preference frequency signal, said phase detector generating a phase signal having a magnitude and frequency that is a function of said phase shift, and
• quantization circuitry connected to receive said phase signal, said phase signal, said quantization circuitry generating digital residue format corresponding to said one preselected residue base.