Accumulator with variable limits
OwnerScott E. Harrow, Judy Mae Fong +1inventors
InventorsScott E. Harrow, Judy Mae Fong, Harold Downey
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Abstract
The amplitudes of a signal on the microphone input of a telephone and a signal on the line input of the telephone are compared with each other and with two thresholds. The comparisons are sampled and the samples control an accumulator including an up-down counter and logic to provide adjustable thresholds. The count in the counter is compared with two other thresholds and the results of the comparisons are used to apply either variable data or fixed data to the counter.
Claims12
In an accumulator including an up-down counter and logic for preventing roll-over, the improvement comprising:
- a first boundary for roll-over, wherein said boundary is less than the capacity of said up-down counter;
- and
- a first multiplexer coupled to said logic for preventing roll-over for supplying a first predetermined count to said up-down counter when the count in said counter is incremented past said first boundary.
In an accumulator including an up-down counter and logic for preventing roll-over, the improvement comprising:
- a first multiplexer coupled to said counter and to a first count for supplying either the output from said counter or the first count to an output;
- a first comparator coupled to said output for comparing the data on said output with a first threshold and producing a first logical output indicative of the comparison;
- first logic means coupled to the first comparator and the first multiplexer for causing the first multiplexer to supply either the output from said counter or the first count to said output depending upon the state of said logical output
Dependencies are inferred from the claim text.