Amplifiers – Wheatstone bridge with amplifier in at least one arm
Patent
1995-10-18
1997-05-20
Muttola, Steven
Amplifiers
Wheatstone bridge with amplifier in at least one arm
330251, H03F 3217
Patent
active
056316054
ABSTRACT:
A power amplifier stage for producing a rectangular signal across a load, which may be predominantly capacitive, by means of a "bridge" amplifier comprises a first pair of transistors which operate alternately as an emitter follower and a second pair of transistors which alternately closes the circuit of the load. The four transistors of the bridge amplifier are respectively driven by identical four current sources in order to minimize the impedance of the circuit of the load for direct current. The transistors of the second pair are alternately connected as diodes. To control the signal amplitude, a generator supplies a control voltage whose value corresponds to a fixed component equal to 2.V.sub.BE, plus a variable component corresponding to the desired amplitude of the signal. Such a power amplifier stage can be used for driving a piezo-electric transducer, particularly for a telephone bell.
REFERENCES:
patent: 4638260 (1987-01-01), Hamley
patent: 5126884 (1992-06-01), Solomon
patent: 5382915 (1995-01-01), Muri et al.
patent: 5453717 (1995-09-01), Gerfault
Marion Michael E.
Muttola Steven
U.S. Philips Corporation
LandOfFree
Power amplifier stage supplying a rectangular signal of controll does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power amplifier stage supplying a rectangular signal of controll, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power amplifier stage supplying a rectangular signal of controll will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1726776