Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Converting input voltage to output current or vice versa
Reexamination Certificate
2008-01-15
2011-10-11
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Converting input voltage to output current or vice versa
C327S094000, C327S095000, C327S096000
Reexamination Certificate
active
08035422
ABSTRACT:
The invention relates to a transconductance amplifier, providing current variations di=k·dv when it receives voltage variations dv.The amplifier comprises a first MOS transistor (MN4) whose drain provides differential currents (I−di, I+di). It comprises an output stage having a second transistor (MP5) of a type opposite to the first, whose source is linked to the drain of the first, whose gate is biased at a constant potential (Vref), and whose drain receives the current variations which are provided by the first transistor and which must be applied to a sampling capacitor. The amplifier furthermore comprises a filter (FLT) with frequency response centered on the central frequency Fo of the signals to be converted, having a very high impedance around this central frequency and a low impedance outside the useful spectrum, the filter being connected to the source of the second transistor (MP5) so as to divert away from the second transistor the current variations which are in a frequency band situated outside the useful spectrum.
REFERENCES:
patent: 6262677 (2001-07-01), Kiriaki et al.
Tom Kwan and Ken Martin, An Adaptive Ananog Continuous-Time CMOS Biquadratic Filter, IEEE Journal of Solid-State Circuits, vol. 26, No. 6, Jun. 1991.
Bram Nauta, A CMOS Transconductance-C Filter Technique for Very High Frequencies, IEEE Journal of Solid-State Circuits, vol. 27, No. 2, Feb. 1992.
Rola A. Baki and Mourad N. El-Gamal, A 1V 0.8mW Multi-GHz CMOS Differential Tunable Image Reject Notch Filter, Circuits and Systems, USA 2005.
Mikio Koyama, Tadashi Arai and Hiroshi Tanimoto, A 2.5-V Active Low-Pass Filter . . . Linear Input Range, IEEE Journal of Solid-State Circuits, vol. 28, No. 12, Dec. 1993.
Tom Kwan and Ken Martin, An Adaptive Ananog Continuous-Time CMOS Biquadratic Filter, presentation at IEEE Custom Integrated Circuits Conference, San Diego, 1991.
Tai Wook Kim, Bonkee Kim, Kwyro Lee, Highly Linear Receiver Front-End Adopting MOSFET . . . Gated Transistors, IEEE Journal of Solid-State Circcuits, vol. 39, No. 1, Jan. 2004.
Commissariat A l'Energie Atomique
Donovan Lincoln
LaRiviere Grubman & Payne, LLP
Poos John
LandOfFree
Transconductance amplifier with a filter for rejecting noise... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transconductance amplifier with a filter for rejecting noise..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transconductance amplifier with a filter for rejecting noise... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4262653