PLESSEY SEMICONDUCTORS LIMITED patents filed

Company number: 04129612

Title	Date Filed	Status	Publication number
Lighting module	2016-09-19	Pending	GB2553851
Light-emitting diode package and method of manufacture	2016-06-07	Awaiting Re-examination	GB2551154
Contents addressable memory	1997-04-03	Terminated	GB2312769
Reduced swing CMOS output buffer	1996-04-26	Terminated	GB2300531
A differential amplifier with I/P buffer differential amplifiers including current mirrors	1996-04-25	Terminated	GB2312579
Ceramic filters and/or resonators	1996-02-13	Terminated	GB2298522
Amplifier circuit using enhanced feedback to minimize distortion	1995-11-28	Terminated	GB2295933
Power switch driver arrangements	1995-10-18	Ceased	GB2294371
Voltage-controlled oscillator arrangements	1995-09-07	Terminated	GB2293934
Wireless Local Area Network System	1995-08-14	Terminated	GB2292654
Semiconductor devices with recessed emitters	1995-07-21	Terminated	GB2303487
Video sync tip clamper	1995-06-13	Ceased	GB2292861
Car alarm	1995-05-10	Terminated	GB2300776
Active load to increase output impedance of transconductor amplifier	1995-03-03	Terminated	GB2298536
Trackerball Device	1995-02-03	Terminated	GB2297606
Trackerball Device	1995-01-26	Terminated	GB2297375
Static random access memories	1995-01-18	Terminated	GB2297173
Frequency shift keyed radio receivers	1995-01-04	Terminated	GB2296845
Wireless local area network synchronisation arrangement	1994-09-14	Terminated	GB2293295
Tunable oscillator arrangement	1994-06-24	Terminated	GB2290916
Portable radio package	1994-06-21	Terminated	GB2291764
Ball grid array arrangement	1994-03-30	Terminated	GB2288286
Direct copper bonded substrates	1994-02-24	Terminated	GB2287131
Class B amplifier with compensated PNP pull down transistor	1994-01-12	Terminated	GB2275383
Flexible lock-down cache.	1993-12-16	Terminated	GB2284911
Cache lock-out	1993-12-01	Terminated	GB2273185
Fast-acting feed-forward automatic gain-control arrangement	1993-08-11	Terminated	GB2280998
Teletext system	1993-07-15	Terminated	GB2268864
A data communication system	1993-07-02	Terminated	GB2268664
Insulating layers for multilayer wiring	1993-07-02	Terminated	GB2279804
Plug in transmitter/receiver for LAN	1993-05-06	Terminated	GB2277841
Random access memory	1993-04-21	Ceased	GB2277390
Non-saturating logic circuit	1993-03-03	Terminated	GB2275839
Video black level tracking	1993-01-25	Terminated	GB2263835
Programmable logic cell	1993-01-12	Ceased	GB2267614
Transceivers	1993-01-08	Terminated	GB2274222
Wideband constant impedance amplifiers	1992-10-28	Ceased	GB2295288
Wideband constant impedance amplifiers	1992-10-28	Ceased	GB2272122
Wideband constant impedance amplifiers	1992-10-28	Ceased	GB2295287
Antenna arrangements	1992-08-28	Ceased	GB2270204
Antenna arrangements	1992-03-31	Ceased	GB2256529
Data tracking system	1992-02-10	Terminated	GB2264010
Polarisers.	1991-12-10	Ceased	GB2254491
Radar arrangement	1991-10-16	Terminated	GB2251752
Moving vehicle transponder	1991-08-30	Ceased	GB2249924
Magnetic head support carrying electronic circuits	1991-06-14	Terminated	GB2256740
A duo-binary and/or binary data slicer	1991-02-21	Ceased	GB2253960
Polariser arrangement	1991-02-12	Terminated	GB2243957
Arrangements for viewing electrical circiuts	1990-12-19	Ceased	GB2251089
Reducing interconnection capacitance in integrated circuits	1990-09-12	Terminated	GB2247986
Method of manufacture	1990-03-12	Ceased	GB2241919
Electronic human tagging arrangement detects if tag is removed	1990-03-01	Terminated	GB2230164
Direct frequency synthesiser	1990-01-09	Terminated	GB2239749
An improved mixer circuit	1990-01-05	Ceased	GB2239752
High frequency supply for a negative resistance-temperature coefficient load	1989-08-16	Terminated	GB2223367
Mounting arrangements for electrical components	1989-08-09	Ceased	GB2221793
Evaluation of median	1989-05-31	Terminated	GB2232513
Audio signal echo cancellation circuit	1989-05-12	Terminated	GB2232860
Faraday rotation device	1989-03-09	Terminated	GB2229043
Digital to analogue convertors	1989-02-15	Ceased	GB2215925
Improvements relating to communication systems	1989-02-04	Ceased	GB2229874
Pulse counting detector fm discriminator	1988-12-15	Ceased	GB2226200
Methods of soldering and solders	1988-10-14	Terminated	GB2225267
Semiconductor devices	1988-09-30	Ceased	GB2223354
Analog to digital converters	1988-09-06	Ceased	GB2222495
Testing integrated circuits	1988-07-21	Ceased	GB2221044
Trackerball arrangement	1988-07-20	Ceased	GB2221016
An analogue to digital converter	1988-07-20	Ceased	GB2221106
Trackerball arrangement	1988-07-06	Ceased	GB2220466
Split-block waveguide construction	1988-05-16	Ceased	GB2206246
Bandgap startup circuit	1988-05-13	Ceased	GB2218544
Testing logarithmic amplifiers	1988-04-26	Ceased	GB2217854
A data path checking system	1988-03-30	Ceased	GB2219172
Sample and hold circuit	1988-01-29	Ceased	GB2214743
A method of forming electrical conductors	1987-12-04	Ceased	GB2213325
Improvements in or relating to logic circuits	1987-09-09	Ceased	GB2209641
A method of providing refilled trenches	1987-07-24	Ceased	GB2207281
Emitter coupled logic devices	1987-07-21	Ceased	GB2207570
An amplifier with improved dynamic range	1987-07-21	Ceased	GB2209444
Phase-locked loop circuits	1987-07-11	Ceased	GB2207310
High frequency waveguide circulator	1987-02-12	Ceased	GB2201044
Character enhancement systems	1987-01-13	Ceased	GB2199967
Semiconductor arrangement	1986-12-04	Ceased	GB2198581
Semiconductor circuit arrangements	1986-09-26	Ceased	GB2253308
Quadrature signal generator	1986-09-16	Ceased	GB2196195
A method of producing a layered structure	1986-07-18	Ceased	GB2178896
A local oxidation of silicon process	1986-06-17	Ceased	GB2192093
Analogue to digital converters	1986-05-16	Ceased	GB2190556
Static memory cell	1986-04-30	Ceased	GB2189954
Current source circuit	1986-01-30	Ceased	GB2186140
Clock extraction from coded data streams	1986-01-24	Ceased	GB2178272
Methods of fabricating semiconductor devices and the semiconductor devices obtained thereby	1985-10-22	Ceased	GB2166293
Low frequency digital notch filter	1985-09-12	Ceased	GB2182513
A method of controlling a distribution of carrier lifetimes within a semiconductor material	1985-08-23	Ceased	GB2179496
Protection structures for integrated circuits	1985-08-09	Ceased	GB2179495
Adaptive cancellation bridge circuit	1985-02-19	Ceased	GB2154836
Frequency mixing arrangement	1985-01-23	Ceased	GB2170070
Electrical contacts for semiconductor devices	1984-12-18	Ceased	GB2168529
Improvements relating to radio receivers	1984-10-09	Ceased	GB2165409
Bipolar transistor logic circuits	1984-09-12	Ceased	GB2146863
Circuits for converting from one television scanning standard to another	1984-09-12	Ceased	GB2148674
Frequency modulation detectors	1984-08-17	Ceased	GB2149987
A method of producing a layered structure	1984-06-11	Ceased	GB2141582
Frequency modulation detection apparatus	1984-06-01	Ceased	GB2151093
Frame aligner for use in telecommunication exchange systems	1983-12-13	Ceased	GB2151437
Constant voltage circuits	1983-09-15	Ceased	GB2146808
Digital to analogue converters	1983-07-30	Ceased	GB2144286
Amplifier circuits	1982-12-01	Ceased	GB2131243
Linear bipolar transistor circuits	1982-12-01	Ceased	GB2131639
Aligning mask with body	1982-10-16	Ceased	GB2129124
Improved time slot arrangements for local area network systems	1982-08-04	Ceased	GB2125653
Speed control of a universal electrical motor	1982-07-17	Ceased	GB2123990
Electrical component simulator	1982-01-20	Ceased	GB2113499
Semiconductor chip package carrier	1982-01-19	Ceased	GB2114821
Transistors	1981-12-09	Ceased	GB2089565
Non-volatile static ram element	1981-01-09	Ceased	GB2091510
Electro-optical terminations	1980-10-16	Ceased	GB2086074
Radio receiver	1980-08-23	Ceased	GB2086158
Frame aligner for digital telecommunications exchange system	1980-07-26	Ceased	GB2063624
Resistive ladder networks	1979-11-14	Ceased	GB2039154
Tunable oscillator	1979-01-12	Ceased	GB2039438
Semiconductor devices	1978-09-18	Ceased	GB2004156
PCM encoder/decoder arrangement	1978-09-11	Ceased	GB2007050

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