Some embodiments of the invention relate a transimpedance amplifier circuit having a negative feedback network that provides additional filtering of an out-of-band transmitted signal is provided herein. In one embodiment, the transimpedance amplifier circuit has a first pole, transimpedance amplifier having a multi-stage operational amplifier with an input terminal and an output terminal. An RC feedback …

Legal parties

Inventors (applicants): Umut Basaran, Ashkan Naeini
Assignees (initial): Intel Mobile Communications GmbH (Neubiberg, DE)
Agents: Eschweiler & Associates, LLC (attorney)

The application was examined by Ryan Johnson (USPTO dept. 2817)


  • 1. A demodulator circuit, comprising: …
  • 2. The demodulator circuit of claim 1 , wherein the first operational amplifier comprises a first …
  • 3. The demodulator circuit of claim 2 , wherein the negative feedback network extends …

Cited documents


  • Yoon US 6552605 B1 / 330/9, Apr. 1, 2003
  • Sutardja US 7173486 B1 / 330/107, Feb. 1, 2007
  • Mak et al. US 7948309 B2 / 330/98, May. 1, 2011



FIG. 1 illustrates a schematic diagram of an exemplary demodulator comprising a transimpedance amplifier. FIG. 2 illustrates a block diagram of some embodiments of a demodulator comprising …



Transceivers are configured to transmit and receive radio frequency (RF) signals. Transceivers operate to transmit data by modulating the data onto a high frequency carrier signal that is transmitted wirelessly. …

Detailed Description

The claimed subject matter is now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes …

More details about Adaptive Filtering of Blocker Signals in Demodulators

Miscellaneous patent data

Developed by Ashkan Naeini et al., the invention is titled Adaptive Filtering of Blocker Signals in Demodulators, claims 1-19 comprise the invention scope, the drawings include the following: Adaptive Filtering of Blocker Signals, schematic diagram of an exemplary, block diagram of some embodiments, exemplary graphs showing the frequency, the examination was conducted by Ryan Johnson (primary examiner, 2817 USPTO department), the application was published on Dec. 16, 2011, numbered 13/328,388 (application), the grant publication date is Dec. 17, 2013, categorized under Having specific distortion, noise or other interference prevention, reduction or compensation as a primary classification, the patent particularly claims a demodulator circuit, comprising…, the published inventor's name is Umut Basaran, the assignee company is Intel Mobile Communications GmbH located in Neubiberg (DE), illustrated by 6 drawings, explained by 11 figures, similar patents are classified under Including plural detector diodes, means of electromechanical devices, Input signal split by LC resonant circuit, Including diode demodulator device, Demodulation or transference of modulation of modulated electromagnetic waves, Amplitude Modulation Demodulator, Transference of modulation using distributed inductance and capacitance, Temperature compensation, means of transit-time tubes, means of diodes, e.g. Foster-Seeley discriminator, assigned to a foreign company or corporation, the patent grant was extended by 17 days, the grant number is 08610495 (publication number), the claim number 1 is selected as exemplary, the published applicant's name is Basaran Umut, the agent - Eschweiler & Associates, LLC.

Invention classification information

The invention is classified under In radio frequency amplifier, intermediate frequency amplifier or converter circuit, Modifications of demodulators to reduce distortion, e.g. by negative feedback, In cascade amplifiers, Means associated with receiver for limiting or suppressing noise or interference, Noise or interference elimination, Having specific distortion, noise or other interference prevention, reduction or compensation, A feedback to input of a prior stage. The designated search classifications include In demodulator or low frequency, Having specific distortion, noise or other interference prevention, reduction or compensation, With balancing or neutralizing, Including plural stages cascaded, Noise or interference elimination, Modulation distortion or cross talk correction or elimination, With specific filter structure, Having negative feedback, Using plural separate signal paths, Having specific distortion, noise or other interference prevention, reduction or compensation, Amplitude Modulation Demodulator, Signal Feedback, Including signal feedback means, By cancelling distortion, noise or other interference, Filter in at least one path, In radio frequency amplifier, intermediate frequency amplifier or converter circuit, Using feedback to reduce distortion, noise or other interference, Phase shift in at least one path, Having frequency-responsive means or phase-shift means in feedback path, Internally generated noise or oscillations, Nonlinearity reduction or compensation, Including an active device in the filter means, Frequency Modulation Demodulator, Including frequency-responsive means in the signal transmission path, Noise reduction or compensation.

Patent details
Publication number 08610495
Publication date Dec. 17, 2013
Kind code B2
Application number 13/328,388
Application date Dec. 16, 2011
Application type U
Application series code 13
Extension term 17
National classification 329/349
Total number of claims 19
Exemplary claims 1
Number of drawings 6
Number of figures 11
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