| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | 直交変調器 | JP2013149580 | 2013-07-18 | JP6211325B2 | 2017-10-11 | 熊川 正啓; 平井 義人 |
| 22 | 送信器 | JP2012534475 | 2012-05-23 | JPWO2012164876A1 | 2015-02-23 | 州一 福田 |
| 省面積かつ低ノイズの送信器を提供する。Iデジタルベースバンド信号が入力されるN個の入力信号遅延機能付直接RF変換器と、Qデジタルベースバンド信号が入力されるM個の入力データ遅延回路付直接RF変換器(DDRC)と、90度位相の異なる差動ローカル信号を生成する2分周器と、出力整合回路と、DDRC、DDRCについての入力データ遅延量を制御する遅延制御回路とから構成される直接RF変調送信器において、DDRC、DDRCの遅延量を遅延制御回路により独立に設定するようにした。特にN=Mと設定し、I、Qで対応するN個ずつにはそれぞれ同じ値の遅延を設定した場合、特定周波数域でのノイズ低減効果が高まる。 | ||||||
| 23 | Pulsed intelligent rf modulation controller | JP2002039884 | 2002-02-18 | JP5177928B2 | 2013-04-10 | ピー、ナスマン ケヴィン; ジェイ、ヴォナ、ジュニア ダニエル; ティー、ラドムスキー アーロン; アール、プルハムス、ジュニア ウィリアム |
| 24 | Subthreshold integrated process variation prevention method in the circuit, and the body potential modulation circuit | JP2011517743 | 2009-09-04 | JP2011528170A | 2011-11-10 | 豪 ▲羅▼; 雁 ▲韓▼ |
| サブスレッショルド集積回路におけるプロセスばらつき防止方法とボディ電位変調回路が掲載されている。 前記ボディ電位変調回路は、目標ＭＯＳデバイス（１１）と、誘導ＭＯＳデバイス（１２）と、電流−電圧変換回路（１３）とを備えている。 前記電流−電圧変換回路は、誘導ＭＯＳデバイスから出力された誘導電流を誘導電圧に変換するとともに、その誘導電圧を目標ＭＯＳデバイスのボディ端にフィードバックして、目標ＭＯＳデバイスのボディ電位を変調するためのものである。 | ||||||
| 25 | Modulation circuit and semiconductor device including the same | JP2010255066 | 2010-11-15 | JP2011130424A | 2011-06-30 | KAMATA KOICHIRO |
| <P>PROBLEM TO BE SOLVED: To reduce power consumption of a modulation circuit, and to reduce power consumption of a semiconductor device having the modulation circuit by reducing power consumption of the modulation circuit. <P>SOLUTION: A modulation circuit includes a load and a transistor serving as a switch. The transistor has an oxide semiconductor layer in which hydrogen concentration is 5×10<SP>19</SP>/cm<SP>3</SP>or less. A off-state current of the transistor is 1×10<SP>-13</SP>A or less. Otherwise, a modulation circuit includes a load, a transistor serving as a switch, and a diode. The load, the transistor and the diode are connected in series between terminals of an antenna. The transistor has an oxide semiconductor layer in which hydrogen concentration is 5×10<SP>19</SP>/cm<SP>3</SP>or less. An off-state current of the transistor is 1×10<SP>-13</SP>A or less. On/off of the transistor is controlled in accordance with a signal inputted to a gate of the transistor. The load is a resistor, a capacitor, or a combination of a resistor and a capacitor. <P>COPYRIGHT: (C)2011,JPO&INPIT | ||||||
| 26 | Differential oscillation apparatus | JP2007124720 | 2007-05-09 | JP4685060B2 | 2011-05-18 | 茂 小林; 卓 藤田 |
| 27 | Apparatus and method for generating an encoded signal by amplitude shift keying | JP2010504694 | 2008-04-24 | JP2010534419A | 2010-11-04 | シャイベ，スヴェン‐マティーアス |
| 振幅偏移変調を用いて信号を符号化するための装置が開示される。 前記装置はスイッチングトランジスタを備えるＥ級増幅器を含み、スイッチングトランジスタのゲートには、Ｅ級増幅器を作動するための動作周波数を持つ電圧が供給される。 Ｅ級増幅器の出力信号において振幅偏移変調を実現するために、Ｅ級増幅器の、スイッチングトランジスタのゲートに供給される電圧の動作周波数（ＦＴ）、または共振周波数（ＦＲ）を、第一の値と第二の値の間で切り替える回路が、動作周波数と共振周波数の間の偏移度を第一の値と第二の値の間で切り替えるために備えられる。 | ||||||
| 28 | Signal modulation circuit | JP2008325654 | 2008-12-22 | JP2009177801A | 2009-08-06 | KOBAYASHI SHIGERU; MATSUO MICHIAKI; SATO JUNJI |
| <P>PROBLEM TO BE SOLVED: To provide a signal modulation circuit which can control a transmission power even when performing a level adjustment of continuous signals from an oscillation circuit. <P>SOLUTION: A pulse generation circuit as an example of the signal modulation circuit includes: an oscillation circuit; a control signal generation circuit; a multiplication circuit; a filter; and a control unit. The oscillation circuit and the multiplication circuit are active circuits formed by active elements. The oscillation circuit outputs continuous signals, which are input to the multiplication circuit. The multiplication circuit is intermittently operated by the control signal output from the control signal generation circuit, thereby generating a pulse signal. The power level is easily adjusted by the signal from the control unit. <P>COPYRIGHT: (C)2009,JPO&INPIT | ||||||
| 29 | Radio frequency transmission resonant power converter and method | JP2003575570 | 2003-03-04 | JP4237636B2 | 2009-03-11 | ノースワージィ、スティーヴン、アール．; ノースワージィ、ロス、ダブリュー． |
| 30 | Modulation circuit, the transmission device and the transmission circuit | JP16227498 | 1998-06-10 | JP3874145B2 | 2007-01-31 | 繁 有沢 |
| 31 | Rf power amplifier having distributed modulation encoding | JP2001109970 | 2001-04-09 | JP2002009637A | 2002-01-11 | DUELLO WAYNE; POSEY DOUGLAS; KORTE THEODORE |
| PROBLEM TO BE SOLVED: To provide a system where modulation encode to control turn-on of power amplifier modules is conducted at each location. SOLUTION: This RF power amplifier system is provided with RF power amplifier modules and two encoders. Each encoder controls the operation of some of the power amplifier modules. Each encoder relates to different modules of the amplifier modules. An exciter receives an amplitude change signal and periodically provides a command signal to each modulation encoder, to instruct each modulation encoder as to how many modules are to be turned on among the related power amplifier modules as a function of the value of an input signal. Each module encoder selects which of the related power amplifiers is to be turned on, in response to the command signal received. COPYRIGHT: (C)2002,JPO | ||||||
| 32 | The mixer | JP18729295 | 1995-07-24 | JP3189631B2 | 2001-07-16 | 光夫 有家 |
| 33 | JPH0344685B2 - | JP19143184 | 1984-09-12 | JPH0344685B2 | 1991-07-08 | YOOZEFU FUENKU; RIHIARUTO SHUTETSUPU |
| 34 | JPS6322082B2 - | JP1069880 | 1980-01-31 | JPS6322082B2 | 1988-05-10 | KOYANAI HIROSHI |
| 35 | Am modulation system | JP934580 | 1980-01-31 | JPS56107607A | 1981-08-26 | IMAZEKI KAZUYOSHI; NAKANO MASAO |
| PURPOSE:To avoid a modulation distortion, by adding the audio modulated wave to the base of a last stage output transistor of collector modulation system. CONSTITUTION:The transmission circuit 6 consists of the quart oscillator 14 of channels CH1-8, the oscillator circuit 7 comprising the oscillating transistor 15 and others, and the modulation/power amplifier circuit 8 adapting a collector modulation system. The audio modulated wave is applied properly to the base of the last stage output transistor 17 via a serial circuit of the capacitor C1 and resistance R1. In such constitution, the modulation distortion can be improved for the transistor 17. | ||||||
| 36 | Amplitude modulation system | JP9494179 | 1979-07-27 | JPS5620308A | 1981-02-25 | YOSHIDA TETSUO |
| PURPOSE:To attain a high-fidelity broadcast superior in transient characteristic by performing final-stage amplitude modulation for a radio broadcasting equipment with high efficiency by using none of a modulation transformer, modulation choke, etc. CONSTITUTION:An electric power amplifier for a carrier employs a switching- mode push-pull circuit consisting of FET48, 49, pulse transformer 50, etc. As a carrier-suppression both-sideband wave generating circuit, on the other hand, switching-mode push-pull power amplifying circuits are composed of FET 44, 45, 46, 47, pulse transformers 50 and 51, etc. Output sides of those two amplifying circuits are connected in series to the primary winding side of transformer 51 via capacitor 55 in the phase where the output of the carrier is suppressed, mixing those outputs. Then, an electric power source is supplied in series to two electric power amplifiers and connection point B is changed with a modulated signal from terminal 42. Consequently, amplitude modulation is carried out with high efficiency by using none of a modulation transformer, modulation choke, etc., so that a high-fidelity superior in transient characteristic can be delivered. | ||||||
| 37 | JPS50153853A - | JP6118174 | 1974-05-30 | JPS50153853A | 1975-12-11 | |
| 38 | JPS50141531U - | JP5263474 | 1974-05-09 | JPS50141531U | 1975-11-21 | |
| 39 | JPS50134163A - | JP4295274 | 1974-04-16 | JPS50134163A | 1975-10-24 | |
| 40 | 무선 주파수 변조기 | KR1020117012718 | 2009-11-05 | KR101283533B1 | 2013-07-15 | 로드리게즈,이스트반; 린드퀴스트,제이알.,로버트,에이. |
| 본 발명의 무선 주파수 변조기 시스템은 무선 주파수 증폭기 및 펄스 변조기를 포함한다. 무선 주파수 증폭기는 무선 주파수 신호를 공급받는 제어 전극과 기준 전위로부터 일정한 전위를 갖는 DC 전압이 인가되었을 때 무선 주파수 신호의 증폭을 수행하는 출력 전극을 갖는 증폭기 트랜지스터, 및 증폭기 트랜지스터에 연결되는 에너지 저장 소자를 구비한다. 펄스 변조기는 무선 주파수 증폭기에 의해 무선 주파수 신호를 증폭하고자 하는 경우 입력 펄스에 응답하여 DC 전압을 출력 전극에 인가하고, 출력 전극으로부터 무선 주파수 신호를 소거하고자 하는 경우 출력 전극에 인가되는 DC 전압의 공급을 중단하며, DC 전압이 출력 전극에 인가되는 경우 에너지 저장 소자에 전하가 저장되는 제 1 스위칭 회로, 및 DC 전압이 출력 전극으로부터 소거되는 경우 입력 펄스에 응답하여 저장된 전하를 방출하는 제 2 스위칭 회로를 구비한다.
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