| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Frequency generating circuit and operation | DE19754203 | 1997-12-06 | DE19754203A1 | 1998-06-18 | CASPERS ALFRED; MUELLER MANFRED; LICHTERFELD STEFAN; ROETTGER NORBERT |
| A two-port modulator uses a first input to modulate the higher frequencies and a second compensation input signal to modulate the lower frequencies closer to DC and a modulator used for DFSK requires for the second input a signal with a large warp or frequency shift range. The warp or frequency shift range of a first signal generated at 44, 46, 66 is increased by mixing it at 42 with a signal applied at 28 and frequency multiplied at 32, 36 and the difference frequency is filtered out at 48 before frequency division at 52. A phase lock loop 56-64, 44 enables the warp oscillator 44 to be stabilised. A processor (not shown) supplies a modulation signal at 70 and the control signals at 72, 74. The arrangement enables two independent frequency shift keyed signals with different frequency shifts to be generated and transmitted in one mode for mobile RF signals and in an another mode for paging signals. | ||||||
| 162 | Radio receiver | GB9707652 | 1996-06-24 | GB2309345B | 1998-04-29 | BEACH MARK ANTHONY; MATTOS PHILIP GERARD |
| 163 | Radio receiver and frequency generator | GB9613197 | 1996-06-24 | GB2302625B | 1998-04-29 | BEACH MARK ANTHONY; MATTOS PHILIP GERARD |
| 164 | Multi-frequency single transistor oscillator and analog and digital down-conversion receiver with frequency error toleration | GB9613197 | 1996-06-24 | GB2302625A | 1997-01-22 | BEACH MARK ANTHONY; MATTOS PHILIP GERARD |
| A frequency generator produces two widely spaced frequency outputs at the terminals of a single transistor. There is also disclosed a fixed frequency dual downconversion receiver, comprising: an analog first downconversion and IF filter stage; means for one-bit coding of the downconverted signal; and means for second downconversion by digital subsampling. The receiver is particularly suitable for use in GPS applications, and the frequency generator can advantageously be used to produce the local oscillator signal for the first mixer, and a clock signal for the digital subsampler. | ||||||
| 165 | METHOD OF AND CIRCUITRY FOR GENERATING TWO PERIODICAL WAVEFORMS OF PREDETERMINED FREQUENCY DIFFERENTIATION THEREBETWEEN | PL29262991 | 1991-12-02 | PL292629A1 | 1992-06-15 | GLOWOCZ BERNARD; RODON FRANCISZEK |
| 166 | SIGNAL SIMULATOR FOR MAGNETIC RECORDING HEAD | CA481925 | 1985-05-21 | CA1243399A | 1988-10-18 | WAGNER RONALD H |
| A head signal simulator for generating simulated signals So from a magnetic recording head without use of the head or associated media, wherein the signals So can be readily varied in amplitude and frequency-content to synthesize various head-readback waveforms. The simulator comprises reference oscillator means inputted to a plurality of prescribed phase-lock loop circuits. One circuit for a prescribed waveform fundamental and/or other such circuit and one for a different harmonic thereof. The simulator also comprises summing means inputted from all the phase-locked loop circuits, and output means inputted by the summing means and adapted to present the desired output waveform So. | ||||||
| 167 | CIRCUIT ARRANGEMENT OF A TUNABLE SINE WAVEFORM GENERATOR | PL26270286 | 1986-11-28 | PL262702A2 | 1987-11-02 | |
| 168 | TWO-FREQUENCY GENERATOR CIRCUIT WITH DIFFERENTIAL FREQUENCY MEASUREMENT | PL25573485 | 1985-10-09 | PL255734A1 | 1987-05-04 | PORTALSKI MAREK; LENCZNEROWICZ KRZYSZTOF |
| 169 | N FREQUENCY GENERATOR CIRCUITRY IN PARTICULAR FOR EXTRAQUICK ACTING REMOTE PROTECTION SYSTEMS FOR POWER LINES | PL25488985 | 1985-08-07 | PL254889A1 | 1987-02-23 | BACHANEK PAWEL; CEBULA MAREK |
| 170 | Generator of a plurality of different frequencies and signal transmitter including such a generator | FR8414784 | 1984-09-26 | FR2570899A1 | 1986-03-28 | MARCHAND PATRICK |
| <P>SELON L'INVENTION, LE GENERATEUR D'UNE PLURALITE DE SIGNAUX DE FREQUENCES DIFFERENTES INCLUT, EN COMBINAISON, UNE HORLOGE 1, UN COMPTEUR D'ADRESSES 2, UNE MEMOIRE 3 ET UN CONVERTISSEUR ANALOGIQUE-NUMERIQUE 4, DISPOSES EN SERIE; LA MEMOIRE 3 EST PREALABLEMENT CHARGEE CASE PAR CASE D'UN ECHANTILLON DE L'AMPLITUDE DE LA SOMME DES SIGNAUX DE FREQUENCES DIFFERENTES CHOISIES DE TELLE MANIERE QUE LES CASES UTILISEES DE LA MEMOIRE 3 CONTIENNENT UN NOMBRE ENTIER DE PERIODES DE CHACUN DES SIGNAUX; LE COMPTEUR 2, QUI EST PILOTE PAR L'HORLOGE 1, ADRESSE SUCCESSIVEMENT CHACUNE DES CASES UTILISEES DE LA MEMOIRE 3; UN CONDENSATEUR 5 EST CONNECTE A LA SORTIE DU CONVERTISSEUR POUR LISSER LE SIGNAL OBTENU.</P><P>APPLICATION AUX SYSTEMES DE TRANSMISSION PONCTUELLE D'INFORMATIONS MULTIPLES DANS LE DOMAINE FERROVIAIRE AU MOYEN DE CONTACTS FIXES DE VOIE.</P> | ||||||
| 171 | TUNEABLE TWO-FREQUENCY SELF-EXCITED OSCILLATOR | SU3593553 | 1983-05-17 | SU1190452A1 | 1985-11-07 | BABAK ALEKSANDR V; YATSEVICH VLADIMIR P |
| 172 | AT81100944 | 1981-02-11 | ATE11617T1 | 1985-02-15 | SCHERER, ERICH | |
| 173 | AT81100944 | 1981-02-11 | AT11617T | 1985-02-15 | SCHERER, ERICH | |
| 174 | DE3007717C2 - | DE3007717 | 1980-02-29 | DE3007717C2 | 1984-12-20 | SCHERER, ERICH, 6603 SULZBACH, DE |
| 175 | AR29066782 | 1982-09-15 | AR231201A1 | 1984-09-28 | ||
| 176 | BALANCED MODULATOR | CA362445 | 1980-10-15 | CA1155927A | 1983-10-25 | TANABE KENZO; SUZUKI JUNJI; KANNO MASASHI |
| A balanced modulator for use at the mixer stage of the front end of a signal receiver. The modulator has a transistor balanced modulation circuit of the double balanced type having a plurality of emitter coupled transistor pairs, a circuit for increasing the bias current in the balanced modulation circuit corresponding to an increase in the input signal level, and a circuit for reducing the local oscillation signal applied to the balanced modulation circuit corresponding to an increase in the input signal level so that distortion in the balanced modulation circuit is reduced over a wide range of the level of the input signal. | ||||||
| 177 | COMPLEX SHAPE OSCILLATION GENERATOR | SU3261105 | 1981-03-16 | SU966866A2 | 1982-10-15 | POTSELUEV ALEKSANDR V |
| 178 | Balanced mixer for radio receiver - reduces distortion in modulator over wide range of signal amplitudes using emitter-coupled transistor pairs | DE3038995 | 1980-10-15 | DE3038995A1 | 1981-05-14 | TANABE KENZO; SUZUKI JUNJI; KANNO MASAHI |
| The mixer has a transistorised doubly-balanced modulator with a number of emitter-coupled transistor pairs. The quiescent current in the balanced modulator is made to increase as the input signal's amplitude increases. The signal being mixed with the input signal and applied to the balanced modulator is made to decrease as the input signal's amplitude increases so that the resulting distortion in the modulator is reduced over a broad range of input signal amplitudes. The mixer is for use in a receiver and its balanced modulator is connected to the antenna and to a local oscillator. The modulator is controlled by the output of an IF amplitude detector. | ||||||
| 179 | VOLTAGE SHAPER | SU2559149 | 1977-12-26 | SU741413A1 | 1980-06-15 | RODIONOV YURIJ N; KASHTANOV YURIJ V; ALEKSEEV YURIJ A |
| 180 | Multichannel Generator. | NL7405404 | 1974-04-22 | NL163396B | 1980-03-17 | NOORDANUS JOHANNES IR; VERSTRAELEN MARIE MARCEL ARNOL |
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