Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1984-10-19
1986-06-17
LaRoche, Eugene R.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330116, 330146, 330311, H03F 345, H03F 368
Patent
active
045958840
ABSTRACT:
An improved transducer amplifier includes a first operational amplifier having low drift of its input offset voltage characteristic and having a first output of a transducer connected to its positive input and a second output of the transducer connected by means of an input resistor to its negative input. The gain of the first operational amplifier is set by a feedback resistor. A second operational amplifier having low current drain is connected as a voltage follower with its input connected to the first transducer output. A differential signal produced between the voltage follower output and the output of the first operational amplifier is applied to a conventional differential to single ended converter circuit with precisely matched input and feedback resistors to eliminate the common mode voltage component of the differential signal and to reference an amplified error signal component of the differential signal to ground. The improved transducer amplifier provides the same common mode rejection and lower input offset voltage drift with lower total current drain and lower cost than conventional instrumentation amplifiers.
REFERENCES:
patent: 3629719 (1971-12-01), Heller
patent: 4138641 (1979-02-01), Karlin et al.
patent: 4490686 (1984-12-01), Dimeff
"Operational Amplifiers, Design and Applications," Burr-Brown, 1971, Part 2, Section 6, pp. 201-207.
LaRoche Eugene R.
Mottola Steven J.
Tobar, Inc.
LandOfFree
Transducer amplifier and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transducer amplifier and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transducer amplifier and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2275261