Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1984-03-07
1986-04-22
Hix, L. T.
Communications: electrical
Audible indication
Percussion-type sound producer
307361, H03M 114
Patent
active
045845573
ABSTRACT:
A quantizer-subtractor circuit is provided with a input circuit for inputting an input signal and a circuit for producing a digital signal corresponding to the input signal. The quantizer-subtractor circuit contains 2.sup.n transistors. These transistors are supplied with different bias voltages by a bias circuit. A control circuit is connected to the transistors and the input circuit and controls the currents passing through the 2.sup.n transistors. A circuit produces as a subtraction output a signal corresponding to the difference between the controlled currents passing through the transistors applied with the bias voltages having odd-ordered magnitudes and the currents flowing through the transistors applied having bias voltages with the even-ordered magnitudes.
REFERENCES:
patent: 4179687 (1979-12-01), van de Plassche et al.
van de Plassche et al., "A High-Speed 7 Bit A/D Converter," IEEE Journal of Solid-State Circuits, vol. SC-14, No. 6, Dec. 1979.
Gray David M.
Hix L. T,.
Tokyo Shibaura Denki Kabushiki Kaisha
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