Transconductance amplifier for inductive loads and method...

Details Transconductance amplifier for inductive loads and method... Transconductance amplifier for inductive loads and method...

2005-07-19

2005-07-19

Nguyen, Patricia (Department: 2817)

Amplifiers

Wheatstone bridge with amplifier in at least one arm

C330S085000, C318S254100

Reexamination Certificate

active

06919763

ABSTRACT:
A transconductance amplifier for inductive loads and a relevant inductive load driving method, the amplifier having an input stage receiving a driving signal (set-point), a power stage connected downstream of the input stage and connected to the load and an output stage fedback on the input stage to transfer a signal associated to the load. Advantageously, the input stage comprises at least a comparator receiving on one input the driving signal and on another input the output of the output stage. A delay block is also provided between the comparator output and the power stage to delay the comparator switching. This can be obtained also by using a hysteretic comparator.

REFERENCES:
patent: 5481178 (1996-01-01), Wilcox et al.
patent: 5959443 (1999-09-01), Littlefield
patent: 5982160 (1999-11-01), Walters et al.
patent: 6222356 (2001-04-01), Taghizadeh-Kaschani
patent: 6479954 (2002-11-01), Peritore et al.
patent: 6791306 (2004-09-01), Walters et al.

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