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Class Information
Number: 455/84
Name: Telecommunications > Transmitter and receiver at same station (e.g., transceiver) > With a common signal processing stage
Description: Subject matter having an active element which performs a signal processing or generating function in the transmitter portion of the apparatus during signal transmission and in the receiver portion of the apparatus during signal reception.

Sub-classes under this class:

Class Number Class Name Patents
455/85 Transmitter oscillator used as detector 71
455/86 Transmitter oscillator used as local oscillator 299

Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
6201952 Radio communication apparatus Mar. 13, 2001
6195563 Radio receiver and radio transmitter Feb. 27, 2001
6192220 Phase lock loop system with ultrafast lock times for half duplex time division multiple access wireless data applications Feb. 20, 2001
6181198 Amplitude and phase demodulation circuit for signals with very low modulation index Jan. 30, 2001
6144862 Pulse-shaping look-up table with transient suppression Nov. 7, 2000
6118811 Self-calibrating, self-correcting transceivers and methods Sep. 12, 2000
6115585 Antenna switching circuits for radio telephones Sep. 5, 2000
6115584 Transmitter-receiver for use in broadband wireless access communications systems Sep. 5, 2000
6072994 Digitally programmable multifunction radio system architecture Jun. 6, 2000
6058292 Integrated transmitter/receiver apparatus (monolithic integration capabilities) May. 2, 2000
6038429 Citizen's band radio with improved reception Mar. 14, 2000
6035184 Signal processing circuit Mar. 7, 2000
6009313 Radio Communication device capable of setting a frequency channel with a small frequency step Dec. 28, 1999
5991603 Narrow-band communication apparatus Nov. 23, 1999
5974302 Dual band cellular/PCS transceiver Oct. 26, 1999
5953640 Configuration single chip receiver integrated circuit architecture Sep. 14, 1999
5930686 Integrated transceiver circuit packaged component Jul. 27, 1999
5924021 Frequency conversion circuit and method for millimeter wave radio Jul. 13, 1999
5911116 Transmitting-receiving switch-over device complete with semiconductors Jun. 8, 1999
5903820 Radio communications transceiver with integrated filter, antenna switch, directional coupler and active components May. 11, 1999
5901344 Method and apparatus for improved zero intermediate frequency receiver latency May. 4, 1999
5887267 Bus arbitrators for common local oscillators in cellular radiotelephone base stations Mar. 23, 1999
5878332 Multiple frequency RF transceiver Mar. 2, 1999
5850187 Integrated electronic tag reader and wireless communication link Dec. 15, 1998
5844939 Low-cost phaselocked local oscillator for millimeter wave transceivers Dec. 1, 1998
5822704 Mobile radio unit for use in dual-mode cellular communications system Oct. 13, 1998
5819165 System for regulating the power output of and linearizing the transmission signal from a radio transmitter Oct. 6, 1998
5778306 Low loss high frequency transmitting/receiving switching module Jul. 7, 1998
5768692 Transmission and reception matching method for a cordless communication apparatus and apparatus thereof Jun. 16, 1998
5768691 Antenna switching circuits for radio telephones Jun. 16, 1998
5764700 Digital radio link system and radio link terminal Jun. 9, 1998
5732330 Dual band transceiver Mar. 24, 1998
5722040 Method and apparatus of frequency generation for use with digital cordless telephones Feb. 24, 1998
5706310 Wide bandwidth loop in a frequency shift keying (FSK) system Jan. 6, 1998
5701594 Transmitter/receiver for a TDMA system using common IF SAW filter Dec. 23, 1997
5694419 Shared resource modulator-demodulator circuits for use with vestigial sideband signals Dec. 2, 1997
5649308 Multiformat auto-handoff communications handset Jul. 15, 1997
5648985 Universal radio architecture for low-tier personal communication system Jul. 15, 1997
5640688 Tuner and splitter-modulator circuit having a common quartz crystal Jun. 17, 1997
5633862 DTMF signal transmission method in single frequency simultaneous transmitting and receiving system and single frequency simultaneous transmitting and receiving system transceiver capable of tr May. 27, 1997
5630216 Micropower RF transponder with superregenerative receiver and RF receiver with sampling mixer May. 13, 1997
5619528 High speed teleconference system Apr. 8, 1997
5604470 Duplexer having transmit and receive sections mounted on a single substrate Feb. 18, 1997
5603099 Transceiver for preventing the degradation of reception sensitivity and modulation accuracy of a transmitted signal when an external reference signal incorporates noise Feb. 11, 1997
5603113 Automatic gain control circuit for both receiver and transmitter adjustable amplifiers including a linear signal level detector with DC blocking, DC adding, and AC removing components Feb. 11, 1997
5590413 Radio transceiver having shared modulation and demodulation mixer circuits Dec. 31, 1996
5584065 Interference cancellation system employing an I/Q quadrature rotator Dec. 10, 1996
5566360 Transmitter/receiver configuration for higher frequencies Oct. 15, 1996
5566204 Fast acquisition clock recovery system Oct. 15, 1996
5561848 Two way paging system with answer-back function Oct. 1, 1996

1 2 3 4 5 6

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