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2. 发明专利

JP2002324698A PULSED INTELLIGENT RF MODULATING CONTROLLER 审中-公开
公开(公告)号：JP2002324698A
公开(公告)日：2002-11-08
申请号：JP2002039884
申请日：2002-02-18
申请人： ENI TECH INC
发明人： NASMAN KEVIN P , VONA DANIEL J JR , RADOMSKI AARON T , PULHAMUS JR WILLIAM R
IPC分类号： H05H1/24 , G05B19/00 , H01J37/32 , H03C1/00 , H03C1/36 , H05H1/46
摘要： PROBLEM TO BE SOLVED: To provide a control method to control output of a generator. SOLUTION: An output (22) of a generator supplies an output signal (12) having a certain settling time to a load having a certain impedance. The settling time is decided for the output signal. The output signal modulates amplitude (20) with modulation waveform. A sense signal representing the modulated output signal is generated (26). The sense signal is sampled (28) at the sampling time point based on the settling time of the output signal, and a digital display of the sampled sense signal is generated. The amplitude modulation of the output is controlled (14) based on the digital display of the sampled sense signal.

3. 发明专利

JP2001244752A DISTORTION COMPENSATING CIRCUIT 失效
公开(公告)号：JP2001244752A
公开(公告)日：2001-09-07
申请号：JP2000051530
申请日：2000-02-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KAHO TAKANA , OKAZAKI KOJI , NAKASUGA YOSHINORI , HORIKAWA KOJI , ARAKI KATSUHIKO
IPC分类号： H03C1/36 , H03F1/32 , H03F3/24 , H04B1/04
摘要： PROBLEM TO BE SOLVED: To provide a distortion compensation circuit that gains efficient signal amplification by increasing an operating point of a high-output amplifier of a wireless transmitter requiring common amplification of signals. SOLUTION: Signals of output ports #2, #4 of a distributor 01 receiving wireless signals are respectively given to mixers MIX-A, MIX-B, the signal of an output port #3 is given to a distortion adjustment means, that has an even number product generating means that generates at least one even product nonlinear distortion having at least either of a base frequency component and a double frequency component, an amplitude phase control means that optionally adjusts amplitude and phase, and a distribution means that distributes a signal into two with an optional phase difference, the two output signals are respectively given to the mixers MIX-A, MIX-B, the respective output signals are given to a multiplexer 02, and a multiplexer 01 multiplexes a signal of the output port #1 of the distributor 01 and an output signal from the synthesizer 02 and provides an output of the synthesized signal.

4. 发明专利

JP2000049874A ASK MODULATOR AND ASK MODULATION METHOD 失效
公开(公告)号：JP2000049874A
公开(公告)日：2000-02-18
申请号：JP21551698
申请日：1998-07-30
申请人： NEC CORP
发明人： SHIIKUMA KAZUMI , YAMAZAKI TOYOE
IPC分类号： H03H7/06 , H03C1/36 , H03H7/38 , H04L25/03 , H04L27/04
摘要： PROBLEM TO BE SOLVED: To provide the ASK modulator and ASK modulation method of a microwave band capable of being miniaturized, lowering power consumption and satisfying the modulation characteristics of a D/U, an occupancy band width and an ON/OFF ratio, etc., by using a passive element. SOLUTION: Base band signals are frequency band limited and outputted by a band limiting circuit 1. The waveform of the output signals becomes the signal waveform of smoothly rising and falling to a time base. Since a driving circuit 2 is operated as a buffer amplifier whose voltage gain is 1 between the band limiting circuit 1 and an ASK modulation circuit 3, an output voltage waveform equal to the output voltage waveform of the band limiting circuit 1 is outputted. The ASK modulation circuit 3 interrupts the carrier waves of the microwave band inputted from the outside by turning a field effect transistor 61 ON and OFF by the voltage of the output signals from the driving circuit 2, performs ASK modulation (binary ASK) and outputs desired ASK modulated waves.

5. 发明专利

JPH11177344A MODULATION CIRCUIT 失效
公开(公告)号：JPH11177344A
公开(公告)日：1999-07-02
申请号：JP33623997
申请日：1997-12-08
申请人： OKI ELECTRIC IND CO LTD
发明人： BUN TADATAMI
IPC分类号： H03C1/40 , H03C1/36
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive modulation circuit whose modulation characteristic is satisfactory, and which can be made into MMIC(Monolithic Microwave Integrated Circuit). SOLUTION: A carrier wave S2 is given to the gate of FET(Field-Effect Transistor) 25 through a capacitor 23 and a resistor 24. The carrier wave S2 is amplified by the FET 25 and is outputted to a drain. A modulation wave S1 is applied to the drain of the FET 25 through a capacitor 21 and an inductor 22, and the drain voltage is controlled. A wave to be modulated Vout is selectively taken out from the drain of the FET 25 by the inductor 22 and a capacitor 28, and it is outputted to a load RL through a capacitor 29.

6. 发明专利

JPH04288723A HIGH FREQUENCY PULSE POWER AMPLIFIER 失效
公开(公告)号：JPH04288723A
公开(公告)日：1992-10-13
申请号：JP2324191
申请日：1991-02-18
申请人： MITSUBISHI ELECTRIC CORP
发明人： MUTO NORIO
IPC分类号： H03C1/36 , H03F1/32 , H03F3/189 , H03K3/80 , H03K6/00 , H04L27/20
摘要： PURPOSE:To offer the high frequency pulse amplifier which can reduce noise sprious generated in the fall of input signals. CONSTITUTION:The emitter of a transistor 3 for base grounded type amplification having C-class operations is connected to the negative pole side of a driving power source 8, and a resistor 11 is inserted between a connecting point O and the base. Further, an outside control circuit is connected to this connecting point O, and this outside control circuit is equipped with a capacitor 13, which is charged through a resistor 12 according to an outside control input, and applied the outside control input just before the fall of the input signal.

7. 发明专利

JPH0344685B2 失效
公开(公告)号：JPH0344685B2
公开(公告)日：1991-07-08
申请号：JP19143184
申请日：1984-09-12
申请人： SIEMENS AG
发明人： YOOZEFU FUENKU , RIHIARUTO SHUTETSUPU
IPC分类号： H03B1/04 , H03B5/12 , H03B5/36 , H03C1/36 , H03C3/24
摘要： An integrable bipolar oscillator circuit, includes four transistors of the same conductivity type, four resistors, three constant current sources having base points and outputs, a reference potential terminal connected to the base points of each of the constant current sources, a supply potential terminal, and a frequency-determining feedback member, the output of the first constant current source being connected to the emitter of the first transistor and to the base of the second transistor, the output of the second constant current source being connected to the emitter of the third transistor and to the base of the fourth transistor, the emitters of the second and fourth transistors being connected to the output of the third constant current source through a given connection, the collectors of the first and third transistors being directly connected to the supply potential terminal, the first and second resistors each being connected between a respective one of the collectors of the second and fourth transistors and the supply potential terminal, the fourth resistor being connected between the base of the first transistor and the collector of the fourth transistor, the third resistor being connected between the base of the third transistor and the collector of the second transistor, the frequency-determining feedback member being connected between the base of the third transmitter and the base of the first transistor, and an oscillator voltage being supplied between the emitters of the first and third transistors.

8. 发明专利

JPH0213848B2 失效
公开(公告)号：JPH0213848B2
公开(公告)日：1990-04-05
申请号：JP2098082
申请日：1982-02-12
申请人： VICTOR COMPANY OF JAPAN
发明人： TORIHASHI WATARU
IPC分类号： H03C1/36 , G10H1/04 , G10H1/057

9. 发明专利

JPH0265402A DISTRIBUTED CONSTANT LINE TYPE AMPLITUDE MODULATOR 失效
公开(公告)号：JPH0265402A
公开(公告)日：1990-03-06
申请号：JP21703388
申请日：1988-08-31
申请人： NEC CORP
发明人： KANEKO TOMOYA
IPC分类号： H03C1/36
摘要： PURPOSE:To obtain a general-purpose amplitude modulator at a wide band by using a dual gate FET so as to constitute a distributed constant line amplifier and providing a 1st high frequency wave input line to which a 1st gate of the dual gate FETs is connected sequentially and a 2nd high frequency wave input line to which a 2nd gate of the dual gate FETs is connected sequentially independently. CONSTITUTION:The 1st gate of the dual gate FETs 1a-1c is connected to connecting points 22a-22c between distributed constant lines 2a-2d of the 1st high frequency input line and the 1st high frequency input line is terminated by a resistor 15. Furthermore, the 2nd gate is connected to connecting points 23a-23c between distributed constant lines 3a-3d of the 2nd high frequency input line and the 2nd high frequency input line is terminated by a resistor 16. Thus, the high frequency power inputted from the high frequency input terminal 11 is subject to amplitude modulation by the dual gate FETs 1a-1c with the high frequency power inputted from the high frequency input terminal 12 and outputted from a high frequency output terminal 13. Thus, the amplitude modulator having the gain over a wide band is obtained.

10. 发明专利

JPS6367195B2 失效
公开(公告)号：JPS6367195B2
公开(公告)日：1988-12-23
申请号：JP17710881
申请日：1981-11-06
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KAWAMOTO KINJI
IPC分类号： H03C1/36 , G10H1/057 , H03K17/687

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