Provided is a transmission circuit that operates highly efficiently by avoiding deterioration of the linearity of an output signal and suppressing occurrence of distortion of the output signal, when using the envelope tracking method. In this transmission circuit, offset control section sets voltage that makes the corrected envelope signal level equal to or higher …

Legal parties

Inventors (applicants): Ryo Kitamura
Assignees (initial): Panasonic Corporation (Osaka, JP)
Agents: Pearne & Gordon LLP (attorney)

The application was examined by Arnold Kinkead (USPTO dept. 2843)


  • 1. A transmission circuit comprising: …
  • 2. The transmission circuit according to claim 1 , wherein: …
  • 3. The transmission circuit according to claim 2 , wherein: …

International priority data

JP: 2010-121664 / May. 27, 2010 (national)

Cited documents


  • Fudaba et al. US 8489037 B2 / 455/102, Jul. 1, 2013
  • JP 2009-152904 A, Jul. 1, 2009
  • Ishikawa et al. US 2009/0160548 A1, Jun. 1, 2009
  • WO 2008/099464 A1, Aug. 1, 2008
  • JP 2009-177640 A, Aug. 1, 2009
  • Fudaba et al. US 2009/0191923 A1, Jul. 1, 2009
  • McCallister et al. US 7570931 B2 / 455/126, Aug. 1, 2009
  • Sigmon et al. US 6084468 A, Jul. 1, 2000
  • JP 4216462 B2, Nov. 1, 2008
  • JP 04-119707 A, Apr. 1, 1992
  • CN 101465621 A, Jun. 1, 2009
  • Raab US 6256482 B1 / 455/108, Jul. 1, 2001


Brief Description of Drawings

FIG. 1 is a block diagram showing an example of a configuration of a conventional transmission circuit; FIG. 2 is a block diagram showing a principal-part configuration of a transmission …


Technical Field

The present invention relates to high efficiency of a transmission circuit used for communication apparatuses including mobile phones or wireless …

Description of Embodiments

Now, embodiments of the present invention will be described in detail with reference to the accompanying …

Embodiment 1

FIG. 2 is a block diagram showing a principal-part configuration of a transmission circuit according to the present embodiment. In FIG. 2 , transmission circuit 100 includes signal generation section …

More details about Transmission Circuit, Communication Apparatus, and Transmission Method

Miscellaneous patent data

Numbered 13/383,486 (application), the applicant's last name is Kitamura, and his first name is Ryo, categorized under Phase Shift Keying Modulator or Quadrature Amplitude Modulator as a primary classification, the patent particularly claims a transmission circuit comprising…, was examined by 2843 USPTO department, the examiner - Arnold Kinkead, the term of the patent was extended by 144 days, located in Osaka (JP), the assignee company is Panasonic Corporation, developed by Ryo Kitamura, the claim number 1 is selected as exemplary, similar documents are classified under Testing correct operation, Demodulator circuits, Receiver circuits, Nonlinear device controlled by modulating signal, using node redundancy, e.g. VRRP, Nonlinearity reduction or compensation, Particular oscillator circuit, Reduction or compensation of nonlinearity in modulation characteristic, Flow control of aggregated links or flows, Including logic element, Provisions for redundant switching, e.g. using parallel switching planes, the assignee classification - a foreign company or corporation, the application was published on May. 12, 2011, 14 claims comprise the protection scope, the patent was granted on Feb. 18, 2014, the invention is titled Transmission Circuit, Communication Apparatus, and Transmission Method, the drawings include the following: Transmission Circuit, Communication Apparatus, and Transmission, Block diagram showing an example, configuration of a regulator, Block diagram showing a principal-part, 24 figures are supplied with the description, the grant number is 08653902, illustrated by 15 drawings, the known inventor's name is Kitamura Ryo, the known agent's organization is Pearne & Gordon LLP.

Invention classification information

The invention is classified under Phase Shift Keying Modulator or Quadrature Amplitude Modulator, Bias control signal from input of amplifier, Amplitude modulation, With Control of Power Supply or Bias Voltage, Amplitude Modulator, Modulated-carrier systems, With feedback of modulated output signal. The designated search classifications include Amplitude Modulator, Amplitude modulation, With Control of Power Supply or Bias Voltage, Bias control signal from input of amplifier, With feedback of modulated output signal, Plural modulation.

Patent details
Publication number 08653902
Publication date Feb. 18, 2014
Kind code B2
Application number 13/383,486
Application date May. 12, 2011
Application type U
Application series code 13
Int. pub. country WO
Int. pub. number WO2011/148582
Int. publication Dec. 1, 2011
Int. filing country WO
Int. filing PCT/JP2011/002649
Filed internationally May. 12, 2011
National stage date Jan. 11, 2012
Extension term 144
National classification 332/103
Total number of claims 14
Exemplary claims 1
Number of drawings 15
Number of figures 24
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