Automatic adjustment of electrical signal parameters

Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems

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331 1R, 331 48, A61N 102

Patent

active

057024260

ABSTRACT:
Apparatus and methods for adjusting an electrical parameter of an electronic device, notably of an active implantable medical device such as a pacemaker or cardiac defibrillator, and an implementing monolithic integrated circuit for conducting the adjustment. The device includes an oscillator circuit (3-6) having an adjustable component (5, 6) determining its period of oscillation, this adjustable component including one or more additional components (6) a Switch circuit (7, 8) for selectively commuting these additional components; a memory register (9) operable to preserve a digital value determining the state of the additional component commutations; a counter device (11) for measuring a relationship between a period (SOSC) produced by the oscillator circuit (as its period of oscillation may be adjusted by commutation of the additional components) and a fixed reference period (CK); a comparator (12) for determining a difference between the relationship measured by the counter and a predetermined control value (NPC); and a code generator (10) to modify the digital value preserved in the register until a value minimizing the difference determined by the comparator is found.

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patent: 5084685 (1992-01-01), Moller et al.
patent: 5347233 (1994-09-01), Ishibashi et al.
patent: 5543754 (1996-08-01), Oroterz

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