Digital Filter and Pulse Width Discriminator.
OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C
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The patent describes a digital filter for use in the rate monitoring portion of an electrical heart monitor. The filter comprises a pulse width discriminator coupled to receive the outputs of a pair of Schmitt triggers and includes a first timer for rejecting short duration pulses. The timer output is only activated when signals are received from both triggers. A second and third timer combine to reject subsequent long duration pulses for a predetermined time after an original pulse of intermediate duration.
- Electrical and Electronic Equipment
- Biomedical Instrumentation and Bioengineering