Amplifiers – Interstage coupling – Transformer coupling
Reexamination Certificate
2008-07-29
2008-07-29
Choe, Henry K (Department: 2817)
Amplifiers
Interstage coupling
Transformer coupling
C330S296000
Reexamination Certificate
active
11467308
ABSTRACT:
Provided is a frequency converter using an amplification circuit that is improved with linearity by coupling a main transistor and an auxiliary transistor in parallel. An amplification circuit that is improved with linearity comprises an input block amplifying an input signal, an induction block inducing a current proportionate to an output signal of the input block and an amplification block comprising. The amplification block comprises a main transistor amplifying the output signal of the induction block, wherein the main transistor is biased to operate at a saturation region and an auxiliary transistor amplifying the output signal of the induction block, wherein the auxiliary transistor is biased to operate at a subthreshold region and coupled to the main transistor in parallel.
REFERENCES:
patent: 3038072 (1962-06-01), Proudfit
patent: 3886458 (1975-05-01), Matsumoto et al.
patent: 3946280 (1976-03-01), Quist
patent: 3949306 (1976-04-01), Watanabe et al.
Choe Henry K
Foley & Lardner
Integrant Technologies Inc.
LandOfFree
Amplification circuit improved with linearity and frequency... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplification circuit improved with linearity and frequency..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplification circuit improved with linearity and frequency... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3922231