×

ELECTRICALLY ISOLATED SIGNAL PATH MEANS FOR A PHYSIOLOGICAL MONITOR

  • US 3,690,313 A
  • Filed: 10/09/1970
  • Issued: 09/12/1972
  • Est. Priority Date: 10/09/1970
  • Status: Expired due to Term
First Claim
Patent Images

1. A circuit for providing electrical isolation between a patient and physiological monitoring apparatus comprising:

  • a. an amplifier;

    b. means for applying a physiological signal from a patient to the input of said amplifier;

    c. means defining an electrical path for connecting said amplifier to a d.c. source of relatively low magnitude;

    d. first isolation means in said electrical path;

    e. means defining a signal transmission path for connecting the output of said amplifier to the input of physiological monitoring apparatus;

    f. second isolation means in said signal transmission path; and

    g. said first and second isolation means each including an extremely low capacitance and no other leakage current path between the patient and earth ground to present a relatively high reactance to line frequency alternating current and each being capable of withstanding relatively high voltages applied thereacross without breakdown for isolating the patient from leakage currents.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×