Digitally controlled amplitude regulating device for electrocard

Details Digitally controlled amplitude regulating device for electrocard Digitally controlled amplitude regulating device for electrocard

1979-12-10

1982-04-20

Kamm, William E.

Surgery

Truss

Pad

128419PG, 128708, 128902, A61B 504, A61N 136

Patent

active

043253849

ABSTRACT:
A signal processing device composed of: a signal input for receiving an electrocardiographic signal containing a succession of QRS complexes; a signal output; a digitally operating unit having a transmission factor which is variable in discrete steps and connected between the signal input and output for supplying to the signal output a signal containing representations of the QRS complexes contained in the signal received by the signal input, with the relation between the amplitude of the signal at the signal output and the amplitude of the corresponding portions of the signal received by the signal input being proportional to the existing transmission factor of the digitally operating unit; and a transmission factor control unit connected to monitor the signal at the signal output for increasing the transmission factor of the digitally operating unit by one step in response to each appearance at the signal output of a QRS complex representation having a peak value between selected first and second threshold values and for reducing the transmission factor by one step in response to each appearance at the signal output of a QRS complex representation having a peak value greater than a selected third threshold value higher than each of the first and second threshold values.

REFERENCES:
patent: 3939824 (1976-02-01), Arneson et al.
Jain et al., "Journal of the Institution of Electronics & Telecommunication ngineers", vol. 23, No. 1, Jan. 1977, pp. 5-6.
Larsen et al., An Improved Receiver for Baseband Data Communication Using a Digitally Controlled AGC, Int. J. Electronics, 1977, vol. 43, No. 6, pp. 593-598.
Madkour et al., A Preprocessing Unit for Wide-Range Measuring Channels, IEEE Transactions on Industrial Electronics Control Instrumentation, vol. IECI-21, No. 4, Nov. 1974, pp. 230-234.

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