公开(公告)号：US20020063609A1

公开(公告)日：2002-05-30

申请号：US09985502

申请日：2001-11-05

Applicant: Valeo Schalter und Sensoren GmbH

Inventor： Frank Kunzer

IPC: H03K007/00

CPC classification number: H03C1/36 ,  H03C1/14 ,  H04L27/04

Abstract: The invention concerns an electric circuit and a method for pulse modulation of a carrier signal (10). The circuit comprises a pulse generator for generating a current pulse and at least one diode switch (12) which can be controlled by the current pulse. To modulate the carrier signal (10) with a particularly short pulse with a clear, square envelope (21), using as simple and inexpensive a circuit as possible, the invention proposes that the circuit comprises at least one chargeable capacitive element (C) whose discharge current controls the at least one diode switch (12). The capacitive element (C) is formed e.g. as a capacitor. The capacitive element (C) is charged with a charging voltage (UL) via a charging resistance (R). Switching of a transistor (18) initiates the discharging process and a current pulse is generated for controlling the diode switch (12).

Abstract translation: 本发明涉及用于载波信号（10）的脉冲调制的电路和方法。 电路包括用于产生电流脉冲的脉冲发生器和可由电流脉冲控制的至少一个二极管开关（12）。 为了使用具有清晰方形包络（21）的特别短的脉冲来调制载波信号（10），使用尽可能简单且廉价的电路，本发明提出了该电路包括至少一个可充电电容元件（C） 放电电流控制至少一个二极管开关（12）。 电容元件（C） 作为电容器。 电容元件（C）通过充电电阻（R）充电充电电压（UL）。 晶体管（18）的切换启动放电过程，产生用于控制二极管开关（12）的电流脉冲。

公开(公告)号：US5028890A

公开(公告)日：1991-07-02

申请号：US517771

申请日：1990-05-02

Applicant: Ronald K. Larson

Inventor： Ronald K. Larson

IPC: H03C1/14

CPC classification number: H03C1/14

Abstract: A microwave amplitude modulation system maintains constant amplitude attenuation at very high modulation rates over a broad range of microwave frequencies in response to voltage driving signals derived from modulation signals. In the system, the video input of a shunt-type PIN diode microwave amplitude modulation system is driven by a logarithmic voltage amplifier circuit which receives the modulation signals as an input.

Abstract translation: 微波振幅调制系统响应于从调制信号导出的电压驱动信号，在宽范围的微波频率上以非常高的调制速率保持恒定幅度衰减。 在该系统中，分流型PIN二极管微波振幅调制系统的视频输入由接收调制信号作为输入的对数电压放大器电路驱动。

公开(公告)号：US4591811A

公开(公告)日：1986-05-27

申请号：US667372

申请日：1984-11-01

Applicant: Takeshi Nakamura

Inventor： Takeshi Nakamura

IPC: H03C1/00 ,  H03C1/10 ,  H03C1/14

CPC classification number: H03C1/14

Abstract: An amplitude-modulated generator includes a phase dividing circuit having a transistor which receives a modulating signal. The transistor is capable of generating from its emitter a first signal matched in phase with the modulating signal and from its collector a second signal opposite in phase with respect to the modulating signal. First and second switching diodes are provided which are alternately driven by a carrier wave and connected in opposite directions with each other between the emitter and the collector of the transistor. The carrier wave is applied to the junction between the first and second switching diodes. A signal is produced from the junction which is very similar to an amplitude modulated signal consisting of a carrier wave which is amplitude modulated by the modulating signal.

Abstract translation: 幅度调制发生器包括具有接收调制信号的晶体管的相位分离电路。 晶体管能够从其发射极产生与调制信号相位匹配的第一信号，并且从其集电极产生相对于调制信号相位相反的第二信号。 提供第一和第二开关二极管，其交替地由载波驱动并且在晶体管的发射极和集电极之间彼此相反地相互连接。 载波施加到第一和第二开关二极管之间的结。 从结点产生的信号非常类似于由调制信号幅度调制的载波组成的幅度调制信号。

公开(公告)号：US4140982A

公开(公告)日：1979-02-20

申请号：US885711

申请日：1978-03-13

Applicant: Wilson E. Alexander

Inventor： Wilson E. Alexander

IPC: H03B1/00 ,  H03B5/18 ,  H03C1/14

CPC classification number: H03B5/1847 ,  H03C1/14 ,  H03B2200/0008 ,  H03B2201/011

Abstract: An RF oscillator and modulator especially useful for UHF applications. The oscillator may comprise a series-tuned Colpitts circuit with the tuned circuit including microstrip transmission lines as impedance elements. The modulator includes a pair of serially connected diodes with the common terminal of the diodes receiving a modulation signal which varies the total current through the diodes. The diodes function as current-variable resistances to attenuate the carrier frequency signal in response to the modulation signal.

Abstract translation: RF振荡器和调制器特别适用于UHF应用。 振荡器可以包括串联调谐的Colpitts电路，其中调谐电路包括作为阻抗元件的微带传输线。 调制器包括一对串联连接的二极管，二极管的公共端接收调制信号，该调制信号改变通过二极管的总电流。 二极管作为电流可变电阻起到响应于调制信号衰减载波频率信号的作用。

公开(公告)号：US3622914A

公开(公告)日：1971-11-23

申请号：US3622914D

申请日：1969-11-24

Applicant: KOREA INST SCI & TECH

Inventor： CHUNG MAN YUNG

IPC: H03C1/14

CPC classification number: H03C1/14

Abstract: A circuit for producing amplitude modulated waves has a tuning circuit which is connected to the output of a crystal oscillator and which contains a voltage variable capacitance load, such as a semiconductor diode. The capacitance of the load is varied in response to a modulating signal to vary the impedance of the tuning circuit and thereby modulate the output signal of the oscillator.

公开(公告)号：US2281020A

公开(公告)日：1942-04-28

申请号：US38162441

申请日：1941-03-04

Applicant: TELEFUNKEN GMBH

Inventor： LOTHAR BRUCK

IPC: H03C1/14

CPC classification number: H03C1/14

公开(公告)号：US1592710A

公开(公告)日：1926-07-13

申请号：US48252821

申请日：1921-07-05

Applicant: JOHN SCOTT-TAGGART

Inventor： JOHN SCOTT-TAGGART

IPC: H03C1/14

CPC classification number: H03C1/14