| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | TRANSMISSION SYSTEM | EP09852286 | 2009-12-17 | EP2515494A4 | 2017-07-12 | AKEBOSHI YOSHIHIRO; OHASHI HIDEYUKI; KOMURA TETSURO |
| Provided is a transmission system capable of improving the SN ratio for noise superimposed on a transmission line and extending the dynamic range. The transmission system transmits a signal between a transmitter (1) and a receiver (3), which are connected to each other via a transmission line (2). The transmitter (1) includes a transmission amplifier (11) for stepping up an amplitude of an input signal. The receiver (3) includes: an amplitude comparison circuit (31) for attenuating the amplitude of the signal, which is output from the transmission amplifier (11) and input via the transmission line (2), and comparing the attenuated amplitude and a reference voltage; a variable attenuation circuit (32) for outputting, when the attenuated amplitude is larger than the reference voltage, the signal input to the receiver (3) after attenuating the amplitude of the signal, and for outputting, when the attenuated amplitude is smaller than the reference voltage, the signal input to the receiver (3) without attenuating the amplitude of the signal; and an amplitude limiting circuit (33) for clipping the amplitude of the signal output from the variable attenuation circuit (32) at a threshold voltage. | ||||||
| 62 | AUDIO SIGNAL AMPLITUDE SUPPRESSION DEVICE | EP14811383 | 2014-03-26 | EP3010146A4 | 2017-01-25 | OSHIMA KENICHI |
| 63 | LIMITEUR DE PUISSANCE RADIOFRÉQUENCE AMÉLIORÉ; CHAÎNE D'ÉMISSION ET/OU DE RÉCEPTION RADIOFRÉQUENCE ET ÉTAGE D'AMPLIFICATION FAIBLE BRUIT ASSOCIÉS | EP14799480.0 | 2014-11-18 | EP3072234A1 | 2016-09-28 | PLAZE, Jean-Philippe; PETIT, Vincent; MALLET-GUY, Benoît |
| The invention relates to a radiofrequency power limiter (300) comprising at least one transistor (T1, T2, T3, T4), a drain (D) of the or each transistor being directly connected to a mesh connecting an inlet (E) and an outlet (S) of the limiter, a source (S) of the or each transistor being connected to a common reference potential, and a gate (G) of the or each transistor being connected to a common command potential (Voff), the or each transistor being non-polarised between the drain thereof and the source thereof during the operation of the limiter. | ||||||
| 64 | Limiter circuit | EP08765356.4 | 2008-06-09 | EP2296271B1 | 2015-08-12 | FURUMIYA, Tetsuo; OHI, Junichi |
| 65 | LIMITER CIRCUIT | EP08765356 | 2008-06-09 | EP2296271A4 | 2013-11-20 | FURUMIYA TETSUO; OHI JUNICHI |
| The limiter circuit of this invention is a limiter circuit which, by switching action of a pair of transistors, allows passage of only signal voltage components of an input signal voltage included in ranges of an upper limit signal voltage and a lower limit signal voltage. With this construction, the pair of transistors carry out comparisons between the input signal voltage and threshold signal voltages and line switching at the same time. Therefore, there is no influence of propagation delay speed, and no switching noise occurs at times of line switching. Since diodes are not used, a high-speed limiter circuit can be manufactured. | ||||||
| 66 | High-linearity signal-processing amplifier | EP12157997.3 | 2012-03-02 | EP2498052A2 | 2012-09-12 | Bingel, Thomas J.; Smith, Douglas E.; Sanders, Steven J.; Tran Vo, Deanne; Ross, Craig G.; Mead, Derek |
A clamp-point active circuit is provided. The clamp-point active circuit includes a rate amplifier configured to receive an output from a device transitioning between at least two levels. The clamp-point active circuit has at least one switching device configured to receive an output from the rate amplifier. The at least one switching device is in at least one respective feedback loop of the rate amplifier. A switching of the at least one switching device causes the rate amplifier to amplify with high linearity in a desired operating range and to clamp outputs received from the transitioning device that are outside the desired operating range to a fixed level.
|
||||||
| 67 | Verfahren zur Spannungsbegrenzung bei einem Transponder | EP07002790.9 | 2007-02-09 | EP1821405B1 | 2009-12-30 | Berhorst, Martin; Kurz, Alexander; Schneider, Peter |
| 68 | Audio amplifier with output power limiter | EP01401414.6 | 2001-05-31 | EP1263133B1 | 2009-05-06 | Lin, Jun Hui |
| 69 | RADIO FREQUENCY POWER AMPLIFIER AND CORRESPONDING METHOD | EP06738203 | 2006-03-14 | EP1869777A4 | 2008-06-11 | MEKECHUK KELLY; SNELGROVE WILLIAM MARTIN; KELLY DAVID; WILSON RICHARD |
| A radio frequency power amplifier and corresponding methods are arranged and configured to drive or provide a radio frequency signal to a resonant load. The amplifier includes a radio frequency switching stage with an output that is coupled to a resonant circuit and configured to provide an output signal with amplitude modulation corresponding to amplitude modulation of an input signal when powered from a fixed voltage power supply and a feedback control system coupled to the input signal and the output signal. The feedback control system includes a sequencer configured to provide a sequencer output that is used to drive the radio frequency switching stage, where the sequencer output has an OFF state that begins at a variable time corresponding to the input and output signal. | ||||||
| 70 | RADIO FREQUENCY POWER AMPLIFIER AND CORRESPONDING METHOD | EP06738203.6 | 2006-03-14 | EP1869777A2 | 2007-12-26 | MEKECHUK, Kelly; SNELGROVE, William Martin; KELLY, David; WILSON, Richard |
| A radio frequency power amplifier and corresponding methods are arranged and configured to drive or provide a radio frequency signal to a resonant load. The amplifier includes a radio frequency switching stage with an output that is coupled to a resonant circuit and configured to provide an output signal with amplitude modulation corresponding to amplitude modulation of an input signal when powered from a fixed voltage power supply and a feedback control system coupled to the input signal and the output signal. The feedback control system includes a sequencer configured to provide a sequencer output that is used to drive the radio frequency switching stage, where the sequencer output has an OFF state that begins at a variable time corresponding to the input and output signal. | ||||||
| 71 | VOLTAGE INTEGRATOR AND TRANSFORMER PROVIDED WITH SUCH AN INTEGRATOR | EP06710743.3 | 2006-01-25 | EP1851671A2 | 2007-11-07 | JULICHER, Paul, J., M. |
| A voltage integrator, comprising a resistor (4) and a capacitor (5) connected in series between an input voltage (V) and ground, wherein the resistance (R) of said resistor and the capacitance (C) of said capacitor are adapted such that a voltage (Vc) across said capacitor approximates the integral of said input voltage (V). Means are provided for preventing said capacitor voltage (Vc) from falling below a lower limit, preferably zero, thereby ensuring automatic initialization of the integrator after each integration cycle. | ||||||
| 72 | Verfahren zur Spannungsbegrenzung bei einem Transponder | EP07002790.9 | 2007-02-09 | EP1821405A1 | 2007-08-22 | Berhorst, Martin; Kurz, Alexander; Schneider, Peter |
Die Erfindung betrifft eine Schaltung zur Spannungsbegrenzung bei einem Transponder mit einem Schwingkreis (19), der wenigstens eine Induktivität (12), eine Kapazität (13), ein Sperrschichtbauteil (27, 35) mit einem Eingang, Ausgang und Steuereingang, einen ersten Schwingkreisanschluss (25), der mit dem Eingang des Sperrschichtbauelements (27, 35) und einen zweiten Schwingkreisanschluss (26), der mit dem Ausgang des Sperrschichtbauelements (27, 35) verbunden ist, umfasst, wobei eine Verbindung des Steuereingangs des Sperrschichtbauteils (27, 35) mit dem ersten Schwingkreisanschluss (25) und mit dem zweiten Schwingkreisanschluss (26) besteht. Weiterhin wird ein Verfahren zur Spannungsbegrenzung bei einem Transponder vorgestellt, bei dem zur Spannungsbegrenzung im Sende- und Empfangsschwingkreis (10) der Steueranschluss des Sperrschichtbauelements (27, 35) mittels der Spannung des ersten (25) und zweiten (26) Schwingkreisanschlusses angesteuert wird.
|
||||||
| 73 | Limiteur de puissance pour radar | EP03104376.3 | 2003-11-26 | EP1431772A1 | 2004-06-23 | TOLANT, Clément; EUDELINE, Philippe; DURIEUX, Franck; STANISLAWIAK, Michel |
La présente invention concerne un limiteur de puissance de signal hyperfréquence. Le limiteur (9a, 9b) de puissance hyperfréquence, comprend :
L'invention s'applique notamment aux radars fonctionnant en bande S pour protéger les amplificateurs faibles bruit de la chaîne de réception contre des signaux hyperfréquence de puissances trop élevées. |
||||||
| 74 | DISPLAY DRIVER APPARATUS | EP97952381.8 | 1997-12-12 | EP1046282B1 | 2001-10-17 | WHITE, Charles, Michael; LAGONI, William, Adamson |
| An emitter follower amplifier is coupled between the output of a high voltage video amplifier and the cathode of a kinescope for reducing the effective capacitance presented to the video amplifier that is attributable to the kinescope cathode, socket, spark gaps, and related stray capacitances. A secondary undesired capacitance loading of the video amplifier is effectively reduced by regulating the collector-emitter voltages of the emitter follower output transistors at substantially constant values thereby improving parameters such as slew rate and bandwidth of the overall video display system. Nonlinear circuitry in the follower circuit facilitates accurate AKB current sensing and provides simplification of the voltage regulation circuitry. White limiting circuitry is included within the video amplifier for reducing excess peak white drive that results in objectionable smears. Black limiting circuitry within the video amplifier is also provided to prevent the collapse of the collector-emitter voltage of the push-pull follower output transistor. The heat sink capacitance of the video amplifier output transistor is screened out via bootstrapping. | ||||||
| 75 | METHOD AND APPARATUS PROVIDING LIMITING TRANSIMPEDANCE AMPLIFICATION | EP96944898.0 | 1996-12-24 | EP0880822A1 | 1998-12-02 | GROSS, Winthrop A. |
| A limiting transimpedance amplifier (46) includes an amplifier stage (48) including a feedback resistor (RF1), a limiting diode (D1) coupled across the feedback resistor, and a stabilization diode (D3) coupled to the amplifier stage to compensate for feedback instability introduced by the limiting diode. The amplifier stage includes an input transistor (Q1) and output transistor (Q2), where the feedback resistor couples an output of the output transistor to an input of the input transistor. A stabilization voltage generator (50) is coupled to the stabilization diode (D1) to provide a stabilization voltage that causes the desired compensation. A method for providing limited transimpedance amplification includes the steps of: (a) amplifying an input current signal at an input node (54) to develop an output voltage signal at an output node (56); (b) limiting the range of the output voltage signal by providing a feedback path between the output node and the input node that includes the parallel connection of a feedback resistor (RF1) and a limiting diode (D1); and (c) compensating for instability in the output voltage signal caused by the limiting diode (D1) in the feedback path. | ||||||
| 76 | Electrostatic destruction preventing circuit and receiving apparatus having the same | EP95302997.2 | 1995-05-02 | EP0681365A1 | 1995-11-08 | Kosuga, Tadashi, Pioneer Elec. Corp. Kawagoe Works; Takahashi, Kazuhiko, Pioneer Elec. Corp.; Tsuboi, Yoshimi, Pioneer Elec. Corp. |
An electrostatic destruction preventing circuit (5, 7) for a receiving apparatus (10, 13), is provided with: a first Zener diode (ZD₁) coupled to a receiving terminal of the receiving apparatus; a second Zener diode (ZD₂) coupled to a ground terminal of the receiving apparatus, and connected to said first Zener diode in series and in reverse polarities to each other; a first resistor (R₁) connected in parallel to said first Zener diode; and a second resistor (R₂) connected in parallel to said second Zener diode. |
||||||
| 77 | Integrierte Begrenzerschaltung für Wechselspannungen | EP90202824.0 | 1990-10-23 | EP0425047B1 | 1994-07-27 | Bockelmann, Gerhard-Jürgen |
| 78 | Dispositif de limitation d'un signal de luminance | EP82400031.9 | 1982-01-08 | EP0057117A2 | 1982-08-04 | Ta Hong, Anh |
La présente invention concerne un dispositif de limitation du signal de luminance qui équipe en particulier les émetteurs de télévision en couleurs. Le dispositif comporte une diode d'écrêtage (5), précédée d'un amplificateur opérationnel (3) muni d'une première et d'une deuxième boucle de contre-réaction respectivement constituées d'une résistance R, et d'une résistance R3. La résistance R, est connectée en amont de la diode d'écrêtage (5), la résistance R3 est connectée en aval, par l'intermédiaire d'un amplificateur de gain unité (6). Des moyens (2) de calage de la tension d'entrée permettent de régler le niveau d'écrétage du signal de luminance. Les valeurs des résistances R, et R3 sont telles que le gain en tension défini par la première boucle est très supérieur au gain en tension défini par la deuxième boucle. Grâce à ce dispositif la zone de fonctionnement non-linéaire de l'écrêteur (au voisinage du blocage) est très réduite. Le signal de chrominance, éventuellement additionné au signal de luminance, est transmis sans altération à l'aide d'un filtre (4) shuntant la diode d'écrêtage (5). Application aux émetteurs de télévision. |
||||||
| 79 | AUDIO LIMITING DEVICE FOR HEADPHONES | PCT/US2007065308 | 2007-03-28 | WO2007112424A3 | 2008-09-04 | INGEMI CHRISTINE; ABBOTT WILLIAM B; ASMUS SCOTT J |
| A system for limiting audio output which in one embodiment includes an audio source, headphones coupled to the audio source, and a limiting circuit coupled to the headphones thereby reducing the power output at the headphones to a safe hearing level. The limiting circuit in one embodiment is integrated into the headphones and can not be disabled. | ||||||
| 80 | APPARATUS AND METHOD FOR AMPLITUDE VARIATION REDUCTION OF A SIGNAL | PCT/US2006045473 | 2006-11-28 | WO2007064611A3 | 2007-12-06 | TINGEY ROBIN |
| A transmitter comprises a base band modulator (101) for generating a complex base band signal to be amplified by a power amplifier (103). The complex base band signal is fed to a first limiter (107) which generates a limited signal by limiting the complex base band signal by independently limiting the first real component and the first imaginary component. A first phase rotator (109) then phase rotates the limited signal by a first phase value to generate a phase rotated signal having a second real component and a second imaginary component. The phase rotated signal is then limited by a second limiter (111) by an independent limiting of the second real and second imaginary components. The double limited signal is then optionally phase rotated in a second phase rotator (113) to compensate for the initial phase rotation. The invention may allow improved amplitude limitation with low complexity. | ||||||
