×

Implantable cardiac defibrillator employing a switched capacitor stage having a non-50/50 duty cycle

  • US 4,964,406 A
  • Filed: 05/19/1989
  • Issued: 10/23/1990
  • Est. Priority Date: 05/19/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. An implantable medical device comprising:

  • electrode means adapted for coupling to a patient'"'"'s heart;

    sensing means having inputs connected to said electrode means for sensing cardiac electrical signals;

    said sensing means including switched capacitor means having switches clocked by first and second control signals with a non-50/50 percent duty cycle;

    said switched capacitor means comprising operational amplifier means having an inverting input terminal, a non-inverting input terminal and an output terminal;

    said operational amplifier means having greater than 50 percent of the clock period to acquire a desired voltage on the output terminal and less than 50 percent of the clock period to hold the acquired voltage.

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