System for measuring and indicating changes in the resistance of a living body
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 21, 2012
Grant Date -
Jun 12, 2008
app pub date -
Mar 19, 2004
filing date -
Mar 19, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An improved device for indicating and measuring small variations in the resistance of a living body is disclosed which utilizes a central processing unit to digitally process sensed body resistances and drive a resistance-indicating display while compensating for the effects of component aging, component tolerances and component temperatures. The device includes an automatic calibration circuit that is automatically activated on each powering up of the device to measure and store measurement values for a plurality of synthesized body resistances that are used to form a compensation model against which sensed body resistances are, subsequently compared for automatic adjustment of display driving measurement values. The central processing unit additionally adjusts the gain of the meter-driving signal by a gain factor dependant on a user-selected meter-sensitivity setting to avoid previously experienced difficulties in monitoring small changes in body resistance caused by difficulty in setting the initially desired meter reading at certain meter-range values, as well as occasional false and unexpected reversals of meter reading as the meter's range was adjusted.
First Claim
Family
