公开(公告)号：US5381107A

公开(公告)日：1995-01-10

申请号：US43741

申请日：1993-04-07

申请人： Yasuo Hamamoto

发明人： Yasuo Hamamoto

IPC分类号： H03H17/02 ,  H03H17/04 ,  H03B1/04

CPC分类号： H03H17/04

摘要： In a time-base inversion type linear phase filter, an input signal is time-base inverted, and thereafter delayed. The delayed signal is time-base inverted back to the original time sequence and then filtered by a first IIR filter. First and second selectors alternately select the time-base inverted signal and the delayed signal in opposite phases to each other. Output signals of the selectors are filtered by second and third IIR filters and then alternately selected by a third selector. An output of the third selector is time-base inverted back to the original time sequence and added to an output of the first IIR filter. A nonlinear emphasis/de-emphasis apparatus is constituted by using this linear phase filter.

摘要翻译： 在时基反转型线性相位滤波器中，输入信号被时基倒相，此后被延迟。 延迟信号被时基反向回到原始时间序列，然后被第一个IIR滤波器滤波。 第一和第二选择器交替地选择时基反相信号和相位相反的延迟信号。 选择器的输出信号由第二和第三个IIR滤波器滤波，然后由第三个选择器交替选择。 第三选择器的输出被时基反向回到原始时间序列，并被加到第一个IIR滤波器的输出端。 通过使用该线性相位滤波器构成非线性强调/去加重装置。

公开(公告)号：US5379003A

公开(公告)日：1995-01-03

申请号：US164370

申请日：1993-12-09

申请人： Tatsuo Bizen

发明人： Tatsuo Bizen

IPC分类号： H03L7/093 ,  H03B1/00 ,  H03B1/04 ,  H03B5/02 ,  H03B5/12 ,  H03L7/099

CPC分类号： H03B5/1231 ,  H03B5/1221 ,  H03B5/1243 ,  H03B2200/0008 ,  H03B2200/0034 ,  H03B2200/004 ,  H03B2200/0062 ,  H03B2201/0208 ,  H03B2202/042 ,  H03B2202/05

摘要： A voltage-controlled oscillation circuit includes a power supply terminal for supplying power to an oscillation stage, a buffer stage, and an output matching stage. Connected between the power supply terminal and ground is a high frequency bypass capacitor for bypassing electrical noise superimposed on the power supply to the side of ground, a voltage feedback resistor is connected in series in a power supply line connected to the power supply terminal, the high frequency bypass capacitor and the voltage feedback resistor constitute a low-pass filter, and the capacitance value of the high frequency bypass capacitor and the resistance value of the voltage feedback resistor are determined so that the cut off frequency of the low-pass filter is at most the frequency f0 of noise.

摘要翻译： 压控振荡电路包括用于向振荡级，缓冲级和输出匹配级供电的电源端。 连接在电源端子和地之间的是高频旁路电容器，用于绕过叠加在地电侧的电气噪声，电压反馈电阻串联连接在与电源端子相连的电源线中， 高频旁路电容器和电压反馈电阻器构成低通滤波器，并且确定高频旁路电容器的电容值和电压反馈电阻器的电阻值，使得低通滤波器的截止频率为 最多频率为f0的噪声。

公开(公告)号：US5329189A

公开(公告)日：1994-07-12

申请号：US916798

申请日：1992-07-17

申请人： Susumu Ushida ,  Sadao Igarashi

发明人： Susumu Ushida ,  Sadao Igarashi

IPC分类号： H03B1/04 ,  H03D7/14 ,  G06G7/00 ,  H03B19/00

CPC分类号： H03D7/1433 ,  H03D7/1425 ,  H03D7/1458 ,  H03D7/1491 ,  H03B2202/03

摘要： A mixer circuit which is improved in distortion characteristic and band characteristic and can assure impedance matching with another circuit at a preceding stage readily and besides can prevent abnormal oscillations. The mixer circuit comprises a differential amplifier constituted from a pair of transistors grounded at the emitters thereof, and a double balanced mixer constituted from first and second pairs of transistors. A first impedance element is interposed between a junction between the emitters of the first pair of transistors of the double balanced mixer and the collector of one of the pair of transistors of the differential amplifier, and a second impedance element is interposed between a junction between the emitters of the second pair of transistors of the double balanced mixer and the collector of the other of the pair of transistors of the differential amplifier.

摘要翻译： 一种改进了失真特性和频带特性的混频器电路，可以很好地保证前一级与另一个电路的阻抗匹配，并且还可以防止异常振荡。 混频器电路包括由在其发射极处接地的一对晶体管构成的差分放大器和由第一和第二对晶体管构成的双平衡混频器。 第一阻抗元件插入在双平衡混频器的第一对晶体管的发射极与差分放大器的一对晶体管之一的集电极之间的接合点之间，第二阻抗元件插入在 双平衡混频器的第二对晶体管的发射极和差分放大器的一对晶体管的另一个的集电极。

公开(公告)号：US5302921A

公开(公告)日：1994-04-12

申请号：US869767

申请日：1992-04-16

申请人： Mikio Shigemori ,  Toru Oida ,  Shigeru Hirasawa ,  Katsumi Yamamura

发明人： Mikio Shigemori ,  Toru Oida ,  Shigeru Hirasawa ,  Katsumi Yamamura

IPC分类号： H03B5/32 ,  H03B1/04 ,  H03B5/36 ,  H03L5/00

CPC分类号： H03B5/36 ,  H03B1/04 ,  H03L5/00 ,  H03B2200/007 ,  H03B2202/04 ,  H03B2202/05 ,  H03B2202/084

摘要： A piezoelectric oscillator in which radiation of higher harmonic components is reduced. A piezoelectric vibrator and a semiconductor device are provided in an oscillation circuit for making the piezoelectric vibrator oscillate, as is a filter for cutting components in a predetermined frequency band or higher harmonic components of an oscillation signal outputted from the semiconductor device. The piezoelectric vibrator, the semiconductor device and the filter are packed in one package. Radiation of the higher harmonic components is reduced by placing the filter close to the oscillator, by providing a shielding or by operating portions of the oscillator output circuit with a reduced supply voltage.

摘要翻译： 一种压电振荡器，其中降低了高次谐波分量的辐射。 压电振动器和半导体装置设置在用于使压电振动器振荡的振荡电路中，以及用于切割预定频带中的分量的滤波器或从半导体器件输出的振荡信号的较高谐波分量。 压电振动器，半导体器件和滤波器被包装在一个封装中。 通过将滤波器靠近振荡器，通过提供屏蔽或通过以较低的电源电压来操作振荡器输出电路的部分来降低高次谐波分量的辐射。

公开(公告)号：US5289139A

公开(公告)日：1994-02-22

申请号：US975781

申请日：1992-11-13

申请人： Slawomir J. Fiedziuszko ,  John A. Curtis

发明人： Slawomir J. Fiedziuszko ,  John A. Curtis

IPC分类号： H01L39/24 ,  H03B1/04 ,  H03B5/04 ,  H03B5/18 ,  H03B7/14 ,  H03B15/00 ,  H03B19/14

CPC分类号： H03B15/003 ,  H03B5/1852 ,  H03B1/04 ,  H03B15/00 ,  H03B19/14 ,  H03B2009/126 ,  H03B2200/0016 ,  H03B2200/0098 ,  H03B5/04 ,  H03B7/14

摘要： A push-push microwave oscillator has two branch oscillators fabricated of a transistor and transmission line elements extending from terminals of the transistor, and a resonator which is fabricated of an annulus of superconductor material and serves to phase lock oscillations of the two branch oscillators. The superconductor material is a composite of a rare earth element and copper oxide such as yttrium-barium-copper oxide. A first transmission line in each of the branch oscillators extends past the resonator with a spacing to provide for electromagnetic coupling between the branch oscillator and the resonator. A second transmission line in each of the branch oscillators has a length equal to approximately one-quarter wavelength of the oscillation frequency to tune the branch oscillator to a common oscillation frequency. A third transmission line in each of the branch oscillators extends towards a junction point to form a summing unit for summing oscillations of the two branch oscillators to provide an output signal of the oscillator. The oscillator is constructed in stripline or microstrip form wherein components of the branch oscillators are coplanar with the resonator and are spaced apart from a ground plane by a dielectric layer of alumina or lanthanum aluminate. Power is extracted at an even multiple of the fundamental frequency, and has a improved accuracy of frequency and reduced phase noise, the latter arising because of a characteristic of the superconductor material wherein its microwave surface resistance increase proportionally with a square of an increase in frequency.

摘要翻译： 推挽式微波振荡器具有由晶体管和从晶体管的端子延伸的传输线元件制成的两个分支振荡器，以及由超导体材料环形制造并用于锁相两个分支振荡器的振荡的谐振器。 超导体材料是稀土元素和氧化铜如钇钡钡氧化物的复合物。 每个分支振荡器中的第一传输线以间隔延伸超过谐振器，以提供分支振荡器和谐振器之间的电磁耦合。 每个分支振荡器中的第二传输线具有等于振荡频率的大约四分之一波长的长度，以将分支振荡器调谐到共同的振荡频率。 每个分支振荡器中的第三传输线延伸到结点以形成用于对两个分支振荡器的振荡求和的求和单元，以提供振荡器的输出信号。 振荡器以带状或微带形式构成，其中分支振荡器的组件与谐振器共面并且通过氧化铝或铝酸镧的介电层与接地平面间隔开。 以基频的偶数倍提取功率，并且具有提高的频率精度和降低的相位噪声，后者由于超导体材料的特性而产生，其中其微波表面电阻与频率增加的平方成正比地增加 。

公开(公告)号：US5278460A

公开(公告)日：1994-01-11

申请号：US864701

申请日：1992-04-07

申请人： Stephen L. Casper

发明人： Stephen L. Casper

IPC分类号： H03K19/003 ,  H03B1/04 ,  H03K3/01

CPC分类号： H03K19/00384

摘要： The CMOS voltage compensating input buffer circuit of the present invention provides a means to stabilize input level trip points and is comprised of a voltage compensating circuit having an input node and an output drive node coupled to an input buffer. The voltage compensating circuit receives its input from a voltage adjusting circuit that follows changes in V.sub.CC while its output drive node is coupled to the series connected CMOS input buffer circuit having an input node and an output node. The buffer's input node receives a signal that VIH/VIL trip points will determine if the output is to be a high or a low and the buffer's output node then couples the resultant level to an output buffer circuit comprised of a CMOS inverter which provides the final output drive. The present invention provides trip point levels corresponding to industry standard VIH/VIL levels to accurately determine the corresponding output with operating voltage supplies (regulated or unregulated) operating between 2 V to 7.5 V.

摘要翻译： 本发明的CMOS电压补偿输入缓冲电路提供了稳定输入电平跳变点的手段，并且包括具有输入节点和耦合到输入缓冲器的输出驱动节点的电压补偿电路。 电压补偿电路接收来自电压调节电路的输入，该电压跟随VCC的变化，而其输出驱动节点耦合到具有输入节点和输出节点的串联连接的CMOS输入缓冲电路。 缓冲器的输入节点接收到VIH / VIL跳变点将决定输出为高电平还是低电平的信号，然后缓冲器的输出节点将所得电平耦合到由CMOS反相器构成的输出缓冲电路，该反相器提供最终 输出驱动。 本发明提供了对应于工业标准VIH / VIL电平的跳变点电平，以便在2V至7.5V之间工作的工作电压源（调节或不调节）精确地确定相应的输出。

公开(公告)号：US5266852A

公开(公告)日：1993-11-30

申请号：US836920

申请日：1992-02-19

申请人： Toshihiko Shigenari ,  Toshihide Miyake

发明人： Toshihiko Shigenari ,  Toshihide Miyake

IPC分类号： H03H11/04 ,  H03F3/45 ,  H03H11/12 ,  H03B1/04

CPC分类号： H03F3/45479 ,  H03H11/1213

摘要： Transistors Q11 and Q12 constitute a first differential amplifier, their emitters are connected with each other by a resistor R1 and also connected respectively to constant-current sources CS11 and CS12. Transistors Q15 to Q17 constitute a second differential amplifier, and the collector of the transistor Q16 is connected with a current mirror 17. This current mirror circuit 17 is constituted by transistors Q18 and Q19 and resistors R3 and R4. The capacitor 22 is supplied with a current from the current mirror circuit 17, and its voltage is fed back through a buffer circuit 14 to the base of the transistor Q12 as a component of the first differential amplifier.

摘要翻译： 晶体管Q11和Q12构成第一差分放大器，它们的发射极通过电阻器R1相互连接，并分别连接到恒流源CS11和CS12。 晶体管Q15至Q17构成第二差分放大器，并且晶体管Q16的集电极与电流镜17连接。该电流镜电路17由晶体管Q18和Q19以及电阻器R3和R4构成。 电容器22被提供有来自电流镜电路17的电流，并且其电压通过缓冲电路14反馈到作为第一差分放大器的分量的晶体管Q12的基极。

公开(公告)号：US5214395A

公开(公告)日：1993-05-25

申请号：US796443

申请日：1991-11-22

申请人： Ki-ho Yun

发明人： Ki-ho Yun

IPC分类号： H01P1/203 ,  H01P3/08 ,  H03B1/04 ,  H03B5/18 ,  H03F3/60 ,  H03H7/46 ,  H03L7/099

CPC分类号： H03B1/04

摘要： An extremely high frequency parasitic signal suppression circuit for use in a local oscillator of an extremely high frequency radio or satellite communication system to eliminate parasitic signals included in a local oscillation signal. A first direct current cut-off device consisting of a microstrip line is connected between the output terminal of a phase-locked oscillator and the input of an amplifier, and to a first low pass filter to supply a direct current source for the amplifier. A second direct current cut-off device and second low pass filter are connected to the output terminal of the amplifier in the same manner as the input terminal.

摘要翻译： 一种用于超高频无线电或卫星通信系统的本地振荡器的极高频率寄生信号抑制电路，用于消除包括在本地振荡信号中的寄生信号。 由微带线组成的第一直流断路装置连接在锁相振荡器的输出端和放大器的输入端之间，并连接到第一低通滤波器，为放大器提供直流电源。 与放大器的输出端子以与输入端子相同的方式连接第二直流切断装置和第二低通滤波器。

公开(公告)号：US5175884A

公开(公告)日：1992-12-29

申请号：US531668

申请日：1990-06-01

申请人： Jose I. Suarez

发明人： Jose I. Suarez

IPC分类号： H03B1/00 ,  H03B1/04 ,  H03B5/12 ,  H03L7/099 ,  H03L7/183

CPC分类号： H03L7/183 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03L7/099 ,  H03B2200/004 ,  H03B2200/0062 ,  H03B2200/0088 ,  H03B2201/0208 ,  H03B2202/027 ,  H03L2207/06

摘要： An apparatus (200) and method for adjusting the bias current of the oscillating device (320) in a VCO (202) in response to changes in the tuning voltage of the VCO to achieve reduced sideband noise.

摘要翻译： 一种用于响应于VCO的调谐电压的变化来调节VCO（202）中的振荡器件（320）的偏置电流以实现降低的边带噪声的装置（200）和方法。

公开(公告)号：US5164686A

公开(公告)日：1992-11-17

申请号：US791738

申请日：1991-11-15

申请人： Nobuo Shiga

发明人： Nobuo Shiga

IPC分类号： H01L21/22 ,  H03B1/04 ,  H03B5/02 ,  H03B5/18

CPC分类号： H03B5/1876 ,  H03B2200/0028 ,  H03B2200/0058 ,  H03B2200/0088 ,  H03B2200/009 ,  H03B2202/027 ,  H03B2202/06 ,  H03B5/1852

摘要： This invention is a high-frequency oscillator including a MESFET, wherein a GaAs MESFET, in which the doping profile of an active layer has a pulse-doped structure, is used as the MESFET. Since the GaAs MESFET is formed to have the pulse-doped structure, the change in transconductance with respect to the change in gate resistance remains constant at gate voltages within a predetermined range. When the gate voltage is set to be a voltage within this predetermined range, a capacitance change with respect to a gate voltage across a gate and a source is reduced. FM noise proportional to the magnitude of this capacitance change is reduced. Accurate information transmission is not interfered with unlike in conventional arrangements.