Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1983-03-02
1986-08-12
Dobeck, B.
Communications: electrical
Audible indication
Percussion-type sound producer
340347AD, H03K 1320
Patent
active
046059202
ABSTRACT:
A prescaling device and method including a timer for generating a timing signal at the end of each of a plurality of timing periods and an integrator for integrating an input signal to generate an integrator output signal proportional thereto. The integrator can hold the integrator output signal in response to hold signal. A comparator is responsive to the integrator output signal for generating a signal when the integrator output exceeds a predetermined level. Control logic generates the hold signal in response to the comparator signal and the timing signal whereby integration is halted at the end of one of the timing periods. A counter counts the timing signals to thereby determine the number of timing periods elapsing prior to the halt of integration. The number of timing periods is indicative of an integration timing range which in turn is indicative of a scaling factor which may be applied to the held output of the integrator. In a preferred embodiment, the timing signals define timing ranges such that each timing range is twice as long as the immediately preceding timing range, whereby the scaling factor decreases by a multiple of two at the end of each timing range.
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Beckman Instruments Inc.
Dobeck B.
Hampson G. T.
Markl S. R.
May W. H.
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