Question
A patient monitoring system has three input sensors to monitor three different parameters of a patient. The output of the system is an alarm which
A patient monitoring system has three input sensors to monitor three different parameters of a patient. The output of the system is an alarm which will aware the medical team of a potential danger. Sensor A measures the blood pressure and produces a HIGH when the pressure falls below a threshold level. Sensor B measures the blood oxygen level and produces a HIGH when the oxygen level is below a threshold level. And sensor C measures the pulse rate which produces a HIGH when the pulse rate goes above a particular threshold level. Only in the following conditions, the alarm should be activated:
- If blood pressure is below threshold and oxygen level is below the threshold.
- If blood pressure is below threshold and pulse rate is above threshold.
- If oxygen level is below threshold and pulse rate is above threshold.
- If blood pressure is below threshold, oxygen level is below threshold and pulse rate is above threshold.
Design the alarm timer circuit with a frequency of 370 kHz and a duty cycle of 20%.
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