Electricity: measuring and testing – Magnetic – Displacement
Patent
1996-10-15
1999-07-13
Snow, Walter E.
Electricity: measuring and testing
Magnetic
Displacement
32420712, 330279, 327306, G01B 714, G01F 2330, H03G 310
Patent
active
059231645
ABSTRACT:
An apparatus and method for automatically and periodically tuning a signal having a gain element, a variable impedance associated with the gain element, and a control device. The gain element has an input for receiving the signal and an output for providing an output signal and is preferably an operational amplifier with a feedback path extending from the output to the input. The variable impedance is preferably connected in series in the feedback path and includes a plurality of resistors connected in series and a plurality of switches, each switch being connected in parallel with one of the resistors. The control device receives the gain element output signal and generates a control signal in response to the amplitude of the gain element output signal. The control signal is transmitted to the variable impedance for regulating the setting of the impedance. Preferably, the control device also includes a pair of comparators for evaluating the gain element output signal and a field programmable gate array for receiving the outputs of the comparators and generating the control signal. The control signal preferably comprises a plurality of switching signals, each signal being connected to one of the switches for controlling the state of the switch.
REFERENCES:
patent: 3539936 (1970-11-01), McGhee
patent: 3898555 (1975-08-01), Tellerman
patent: 4943773 (1990-07-01), Koski et al.
patent: 4952873 (1990-08-01), Tellerman
patent: 5115193 (1992-05-01), Bean et al.
patent: 5206586 (1993-04-01), Yauch et al.
patent: 5212444 (1993-05-01), Abramovich et al.
patent: 5233309 (1993-08-01), Spitainy et al.
patent: 5253522 (1993-10-01), Nyce et al.
patent: 5311124 (1994-05-01), Hubbard et al.
patent: 5313160 (1994-05-01), Gloden et al.
patent: 5334933 (1994-08-01), Tellerman
patent: 5367255 (1994-11-01), Nyce et al.
patent: 5545984 (1996-08-01), Gloden et al.
patent: 5590091 (1996-12-01), Gloden et al.
patent: 5640109 (1997-06-01), Nyce
Ehling Ernst
Gass Ernst
Geisz Joszef
Balluff, Inc.
Snow Walter E.
LandOfFree
Apparatus and method for automatically tuning the gain of an amp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for automatically tuning the gain of an amp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for automatically tuning the gain of an amp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2278697