Registers – Transfer mechanism – Traveling pawl
Patent
1975-09-05
1977-01-04
Smith, Jerry
Registers
Transfer mechanism
Traveling pawl
235152, 235197, G06G 728
Patent
active
040015556
ABSTRACT:
For weighting input signal in accordance with a mathematical transfer function represented by a plurality of straight lines each of which intersects the next at a separate break-point, signal processing apparatus receives or generates a train of pulses, the number of pulses received over a sampling period being related to the signal, and detects preset numbers of pulses corresponding to the break-points, the number detected at the end of the sampling period identifying the highest break-point reached. The detection of each break-point is used to produce an analogue signal corresponding to the value of the break-point and a voltage source is selected corresponding to the gradient of the straight line section following the break-point. Pulses received after each break-point are counted, to be re-set at the next break-point, and the total at the end of the sampling period multiplied by the gradient in a D/A converter to give the analogue value of the signal in excess of the highest break-point. The two analogue signals are summed to provide output signal of the input signal as weighted by the function.
REFERENCES:
patent: 3345505 (1967-10-01), Schmid
patent: 3373273 (1968-03-01), Schubert
patent: 3412240 (1968-11-01), Hunt et al.
patent: 3480767 (1969-11-01), Howe
patent: 3678258 (1972-07-01), Patmore et al.
patent: 3729625 (1973-04-01), Inoue
patent: 3821524 (1974-06-01), Wahl
patent: 3831011 (1974-08-01), Hulme
Levis Peter Stanley
Shepherd Geoffrey
Ferranti Limited
Smith Jerry
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