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Class Information
Number: 333/25
Name: Wave transmission lines and networks > Coupling networks > Balanced to unbalanced circuits
Description: Networks including four terminals, the impedance across one pair of terminals being symmetrical and the impedance across another pair of these terminals being unsymmetrical with respect to a given potential plane (e.g., ground), these impedances being effective to convert symmetrical potential applied at the symmetrical pair of terminals to unsymmetrical potential at the other pair of terminals or to convert unsymmetrical potential applied at the unsymmetrical pair of terminals to symmetrical potential at the other pair of terminals, and systems under the class definition including a balanced to unbalanced circuit coupling.

Sub-classes under this class:

Class Number Class Name Patents
333/26 Having long line elements 643

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8669829 Multi-octave power amplifier Mar. 11, 2014
8659367 Utilizing an on-chip transformer to generate quadrature signals Feb. 25, 2014
8653904 Thin film balun Feb. 18, 2014
8648667 Thin film balun Feb. 11, 2014
8646018 Increased cable television tap bandwidth utilizing existing tap housings Feb. 4, 2014
8638181 Wideband balun using re-entrant coupled lines and ferrite material Jan. 28, 2014
8639194 Tunable antenna with a conductive, physical component co-located with the antenna Jan. 28, 2014
8624369 Balance filter packaging chip having balun mounted therein and manufacturing method thereof Jan. 7, 2014
8564382 Miniaturized wide-band baluns for RF applications Oct. 22, 2013
8558635 3-way balun for planar-type double balanced mixer Oct. 15, 2013
8552812 Transformer with bypass capacitor Oct. 8, 2013
8547185 Center-tapped inductor balun Oct. 1, 2013
8542080 All-pass network Sep. 24, 2013
8502620 Balun system and method Aug. 6, 2013
8482366 Laminated balance filter Jul. 9, 2013
8471645 Balanced-unbalanced transformer Jun. 25, 2013
8456267 High-impedance DC-isolating transmission line transformers Jun. 4, 2013
8447256 Digital voltage-controlled attenuator May. 21, 2013
8436695 Imbalance detection and reduction for wideband balun May. 7, 2013
8432236 Compact highly integrated electrical module with interconnection of BAW filter and balun circuit and production method Apr. 30, 2013
8427388 Eight-shaped RF balun Apr. 23, 2013
8400232 Figure 8 balun Mar. 19, 2013
8390391 Semiconductor device and method of integrating balun and RF coupler on a common substrate Mar. 5, 2013
8368481 RF switchable balun Feb. 5, 2013
8362849 Broadband balun Jan. 29, 2013
8350643 High frequency device, filter, duplexer, communication module, and communication apparatus Jan. 8, 2013
8339218 Single-to-balanced band pass filter Dec. 25, 2012
8334732 Method and system for generating quadrature signals utilizing an on-chip transformer Dec. 18, 2012
8324981 Composite balun Dec. 4, 2012
8319578 Method and system for configurable differential or single-ended signaling in an integrated circuit Nov. 27, 2012
8319577 Thin film balun Nov. 27, 2012
8299869 Setting of a balun Oct. 30, 2012
8279018 Trifila balun for wireless transceiver Oct. 2, 2012
8269575 Semiconductor device and method of forming RF balun having reduced capacitive coupling and high CMRR Sep. 18, 2012
8270912 Method and system for a transformer in an integrated circuit package Sep. 18, 2012
8264297 Balun signal splitter Sep. 11, 2012
8242639 Inductive rotary joint with low loss supply lines Aug. 14, 2012
8232850 Method and system for flip chip configurable RF front end with an off-chip balun Jul. 31, 2012
8228133 Unbalanced-balanced converter Jul. 24, 2012
8228137 Filter, demultiplexer, and module including demultiplexer, communication apparatus Jul. 24, 2012
8217734 Apparatuses and methods for coupling a signal to and/or from a cable Jul. 10, 2012
8203416 Planar inductive structure Jun. 19, 2012
8174810 Method and apparatus for reducing differential mode and common mode reflections in motor drives May. 8, 2012
8131226 Multi-band-high-frequency circuit, multi-band high-frequency circuit component and multi-band communication apparatus using same Mar. 6, 2012
8110895 Circuit substrate structure and circuit apparatus Feb. 7, 2012
8076996 Hybrid balun apparatus Dec. 13, 2011
8072287 Method and system for configurable differential or single-ended signaling in an integrated circuit Dec. 6, 2011
8072290 Method and system for generating quadrature signals utilizing an on-chip transformer Dec. 6, 2011
8058948 Signal splitter with improved transmisson line transformer Nov. 15, 2011
8035458 Semiconductor device and method of integrating balun and RF coupler on a common substrate Oct. 11, 2011

1 2 3 4 5 6

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