Temporal averaging using a voltage mode D/A converter

Details Temporal averaging using a voltage mode D/A converter Temporal averaging using a voltage mode D/A converter

1986-11-17

1987-08-04

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

364575, 364572, 364606, H03M 166

Patent

active

046849220

ABSTRACT:
A digitally programmable infinite impulse response (IIR) filter particularly useful as a temporal averager. The filter comprises a voltage mode multiplying digital/analog converter (12) and two sample-and-hold circuits (10, 16). The first sample-and-hold circuit receives the input signal to the system and supplies its output signal to the reference voltage input terminal of the DAC. The second sample and hold circuit has its input terminal connected to the voltage output terminal of the DAC and has its output connected to the analog ground terminal of the DAC. A digital input code (D) supplied to the DAC controls its gain and the degree of noise rejection provided by the filter, by altering the frequency response of the filter.

REFERENCES:
patent: 3728719 (1973-04-01), Fish
patent: 3789199 (1974-01-01), Kotwicki
patent: 4350974 (1982-09-01), Gordon

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