Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1974-06-13
1976-03-02
Sloyan, Thomas J.
Communications: electrical
Audible indication
Percussion-type sound producer
324 99D, H03K 1302, H03K 1320
Patent
active
039421724
ABSTRACT:
The analogue to digital converter is of the bipolar mark-space type and includes an integrator for integrating the analogue input signal to be converted. A square wave generator is connected to the input of the integrator so as to superimpose a triangular periodic signal on the output signal produced by the integrator.
First and second level detectors are connected to compare the output signal from the integrator with first and second detector levels respectively to produce first and second control signals respectively when the magnitude of the output signal from the integrator exceeds the first level and falls below the second level respectively. Switch means responsive to the first and second control signals are provided to respectively apply first and second reference signals. The conversion interval is set equal in duration to the duration of an integral number of cycles of the periodic triangular signal. A counter is provided for counting clock pulses during the application of either of the reference signal sources to the integrator.
REFERENCES:
patent: 2798667 (1957-07-01), Spielberg et al.
patent: 3500109 (1970-03-01), Sugiyama et al.
McMahon Kevin
Sherman William R.
Sloyan Thomas J.
The Solartron Electronic Group Limited
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