H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/21
H03F 3/45 (2006.01) H03F 3/30 (2006.01)
Patent
CA 1260080
TITLE OF THE INVENTION "OPERATIONAL AMPLIFIER CIRCUIT HAVING WIDE OPERATING RANGE" ABSTRACT OF THE DISCLOSURE An operational amplifier circuit operable with a common- mode input voltage variable over a substantially full range between given source voltages, wherein complementary first and second differential transistor pairs each consisting of transistors having current input terminals connected together are arranged with current mirror circuits and constant-current source devices so that, the first differential transistor pair is turned off and the second differential transistor pair operates as input devices for a load circuit when the common- mode input voltage approximates the lower sopurce voltage. An increase in the common-mode input voltage causes the first differential transistor pair to turn on and gives rise to a decrease in the current flowing through the second differen- tial transistor pair, in which instance the first differential transistor pair compensates for the reduction in the current through the second differential transistor pair by the action of the current mirror circuit associated with the two transis- tor pairs. The voltage applied to the load device is main- tained constant without respect to the common-mode input voltage supplied to the differential transistor pairs so that there are no noises generated during transition of the common- mode input voltage through a certail voltage level.
546395
Corporation Nec
Smart & Biggar
LandOfFree
Operational amplifier circuit having wide operating range does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Operational amplifier circuit having wide operating range, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operational amplifier circuit having wide operating range will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1274115