公开(公告)号：US5057788A

公开(公告)日：1991-10-15

申请号：US573951

申请日：1990-08-28

Applicant: Susumu Ushida ,  Sadao Igarashi

Inventor： Susumu Ushida ,  Sadao Igarashi

IPC: H03F3/45

CPC classification number: H03F3/45085 ,  H03F2203/45601 ,  H03F2203/45604 ,  H03F2203/45631 ,  H03F2203/45652 ,  H03F2203/45702

Abstract: A two-stage differential amplifier connected in cascade according to the present invention is suitable for fabrication within an integrated circuit, in which a constant current source circuit is connected with the common emitters of the transistors in the preceding stage differential amplifier, and the emitters of the transistors in the succeeding stage differential amplifier are connected with the collectors of these transistors through impedance elements. Current consumption in the overall amplifier is reduced and heat production therein is suppressed. Furthermore, since a capacitor is connected between the collector of each of the transistors in the preceding stage differential amplifier and the base of each of the transistors in the succeeding stage differential amplifier, it is possible to match easily the input and the output impedances in the succeeding and preceding amplifier by means of this capacitor and the impedance elements described above.

Abstract translation: 根据本发明的级联连接的两级差分放大器适用于集成电路内的制造，其中恒流源电路与前级差分放大器中的晶体管的公共发射极连接，并且发射器 后级差分放大器中的晶体管通过阻抗元件与这些晶体管的集电极连接。 整个放大器的电流消耗减少，并且抑制其中的热量产生。 此外，由于电容器连接在前级差分放大器中的每个晶体管的集电极和后级差分放大器中的每个晶体管的基极之间，因此可以容易地匹配输入和输出阻抗 通过该电容器和上述阻抗元件的后续放大器和前一放大器。

公开(公告)号：US4611882A

公开(公告)日：1986-09-16

申请号：US530237

申请日：1983-09-08

Applicant: Susumu Ushida

Inventor： Susumu Ushida

IPC: H01L23/52 ,  H01L23/66 ,  H01L25/16 ,  H01L27/13 ,  H05K1/02 ,  H05K1/03 ,  H05K1/11 ,  H05K1/16 ,  H05K3/42 ,  H01L39/02 ,  H01G1/005

CPC classification number: H05K1/162 ,  H01L23/66 ,  H01L25/16 ,  H01L2924/0002 ,  H05K1/0237 ,  H05K1/0306 ,  H05K1/112 ,  H05K2201/09763 ,  H05K3/42

Abstract: A high-frequency circuit device composed of hybrid ICs, comprises an insulated substrate, an active component fabricated on the insulated substrate and including a ground terminal for grounding high-frequency signal components, a first electrode fabricated on one surface of the insulated substrate and connected to the ground terminal, a ground conductor on the insulated substrate, an annular dielectric body placed on the ground conductor, a second electrode fabricated on an opposite surface of the insulated substrate in confronting relation to the ground conductor across the dielectric body and connected to the first electrode through a through hole defined in the insulated substrate, the ground terminal of the active component connected to ground high-frequency signal components through the first electrode, the through hole, the electrode, the dielectric body, and the ground conductor.

Abstract translation: 由混合IC构成的高频电路装置包括：绝缘基板，在绝缘基板上制造的有源元件，具有用于接地高频信号元件的接地端子;在绝缘基板的一个表面上制造的第一电极， 到接地端子，绝缘基板上的接地导体，放置在接地导体上的环形电介质体，第二电极，其制造在绝缘基板的相对表面上，与介电体的接地导体面对面，并连接到 第一电极通过绝缘基板中限定的通孔，有源部件的接地端子通过第一电极，通孔，电极，电介质体和接地导体连接到地面高频信号部件。

公开(公告)号：US4370626A

公开(公告)日：1983-01-25

申请号：US175953

申请日：1980-08-07

Applicant: Susumu Ushida

Inventor： Susumu Ushida

IPC: H04B1/26 ,  H03B1/00 ,  H03B5/02 ,  H03B5/12 ,  H03B5/18

CPC classification number: H03B5/1231 ,  H03B5/1203 ,  H03B5/1243 ,  H03B2200/004 ,  H03B2201/0208 ,  H03B2201/031

Abstract: A local oscillator circuit includes an inner conductor to which a pick up coil is inductively coupled. The pickup coil is further connected with a capacitor to form a resonance circuit. The resonance frequency of the resonance circuit is set higher than those frequencies in the frequency band of the local oscillator so as to pick up oscillation signals into steady level over the frequency band.

Abstract translation: 本地振荡器电路包括内部导体，拾音线圈感应耦合到该内部导体。 拾波线圈进一步与电容器连接以形成谐振电路。 谐振电路的谐振频率被设定为高于本地振荡器的频带中的频率，以便将振荡信号拾取到频带上的稳定电平。

公开(公告)号：US4348645A

公开(公告)日：1982-09-07

申请号：US181672

申请日：1980-08-27

Applicant: Susumu Ushida ,  Hiroyuki Yanagida

Inventor： Susumu Ushida ,  Hiroyuki Yanagida

IPC: H03F1/26 ,  H03F3/191 ,  H04B1/10 ,  H04B1/26 ,  H04N7/10 ,  H04N5/50

CPC classification number: H03F3/191 ,  H03F2200/168 ,  H03F2200/541

Abstract: A buffer amplifier circuit of a wideband tuner has an output transistor. The output terminal of this transistor is grounded through a matching transformer having two taps. One of the taps constitutes a terminal through which the output signal is delivered to a mixer circuit, while the other tap is grounded through a capacitor which constitutes, in cooperation with the matching transformer, a trap circuit. This trap circuit is adapted to trap a frequency which is about twice as high as the low region oscillation frequency of a local oscillator which produces an input to the buffer amplifier circuit.

Abstract translation: 宽带调谐器的缓冲放大器电路具有输出晶体管。 该晶体管的输出端通过具有两个抽头的匹配变压器接地。 一个抽头构成端子，通过该端子将输出信号传送到混频器电路，而另一个抽头通过与匹配变压器协作构成陷波电路的电容器接地。 该陷波电路适于捕获大约是产生对缓冲放大器电路的输入的本地振荡器的低频振荡频率的两倍的频率。

公开(公告)号：US4254378A

公开(公告)日：1981-03-03

申请号：US9297

申请日：1979-02-05

Applicant: Susumu Ushida

Inventor： Susumu Ushida

IPC: H03D3/08

CPC classification number: H03D3/08

Abstract: In a Foster-Seeley discriminator circuit having a discriminating resonance circuit, resonance circuits having series resonance characteristics are respectively connected between a signal source and both ends of the discriminating resonance circuit so as to raise the level of a composite output voltage of the frequency discriminator circuit, whereby the sensitivity of the output voltage versus the frequency can be enhanced.

Abstract translation: 在具有识别谐振电路的福斯特 - 塞利鉴频器电路中，具有串联谐振特性的谐振电路分别连接在信号源与识别谐振电路的两端之间，以提高鉴频电路的复合输出电压的电平 从而可以提高输出电压对频率的灵敏度。

公开(公告)号：US5115317A

公开(公告)日：1992-05-19

申请号：US628741

申请日：1990-12-17

Applicant: Sadao Igarashi ,  Susumu Ushida

Inventor： Sadao Igarashi ,  Susumu Ushida

IPC: H03B1/00 ,  H03B5/12 ,  H03D7/12 ,  H03J5/02

CPC classification number: H03J5/0272 ,  H03B5/1215 ,  H03B5/1231 ,  H03B5/1243 ,  H03D7/12 ,  H03B2200/004 ,  H03B2201/0208

Abstract: A tuning apparatus is disclosed in which a television signal of either the UHF band or the VHF band is subjected to frequency conversion to obtain an intermediate frequency and, thereby, the television signal for a desired channel is selected. The tuning apparatus allows either the television signal of the UHF band or the television signal of the VHF band to be converted to an intermediate frequency by means of a common mixer. The mixer is constituted of a balanced mixer of a two-pair differential type. The tuning apparatus includes a local oscillator for reception of the UHF band and a local oscillator for reception of the VHF band. The intermediate frequency stage as the output of the mixer is provided with an attenuator of which the degree of attenuation when the UHF band is received and that when the VHF band is received are different and, thereby, the gains of the apparatus as a whole are equal when receiving the UHF band and when receiving the VHF band. Deterioration in the noise factor is thereby lessened. The RF amplifiers and local oscillators are each provided with a constant current circuit on the emitter side of the amplifying transistor circuit or the oscillator transistor circuit, and the UHF receivable state or the VHF receivable state is brought about by activating or deactivating the constant current circuit. The local oscillation signal is adapted to be supplied to the mixer through amplifiers in two stages and the local oscillation signal for PLL controlling is taken out from the output of the amplifier in the first stage.

Abstract translation: 公开了一种调谐装置，其中对UHF频带或VHF频带的电视信号进行频率转换以获得中频，从而选择所需频道的电视信号。 调谐装置允许通过公共混频器将UHF频带的电视信号或VHF频带的电视信号转换成中频。 混频器由两对差分型的平衡混频器构成。 调谐装置包括用于接收UHF频带的本地振荡器和用于接收VHF频带的本地振荡器。 作为混频器的输出的中频级设置有衰减器，其中接收UHF频带时的衰减程度和接收VHF频带时的衰减程度不同，因此整个装置的增益是 当接收到UHF频带和接收VHF频带时相等。 噪音因素的恶化因此减轻。 RF放大器和本地振荡器各自在放大晶体管电路或振荡晶体管电路的发射极侧设置恒流电路，并且通过激活或去激活恒流电路来实现UHF可接收状态或VHF可接收状态 。 本地振荡信号适于通过两级放大器提供给混频器，并且在第一级从放大器的输出端取出用于PLL控制的本地振荡信号。

公开(公告)号：US5329189A

公开(公告)日：1994-07-12

申请号：US916798

申请日：1992-07-17

Applicant: Susumu Ushida ,  Sadao Igarashi

Inventor： Susumu Ushida ,  Sadao Igarashi

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

CPC classification number: H03D7/1433 ,  H03D7/1425 ,  H03D7/1458 ,  H03D7/1491 ,  H03B2202/03

Abstract: 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.

Abstract translation: 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：US4580290A

公开(公告)日：1986-04-01

申请号：US495781

申请日：1983-05-18

Applicant: Susumu Ushida

Inventor： Susumu Ushida

IPC: H04N1/23 ,  H03D7/00 ,  H03D7/16 ,  H03D9/06 ,  H03F3/60 ,  H04B1/26 ,  H04N7/16

CPC classification number: H03F3/60 ,  H03D7/16

Abstract: An amplifier for use with a local oscillator in a frequency converter including a mixer for converting a number of channel frequencies received into a certain band of intermediate frequencies, comprises a circuit for amplifying an oscillation signal from the local oscillator and supplying an amplified signal to the mixer through an output terminal thereof, and a trap circuit composed of distributed constant elements for suppressing the certain range of intermediate frequencies. The distributed constant elements include a first microstrip line connected in series to the output terminal, a second microstrip line connected in series with the first microstrip line, and a third microstrip line connected in parallel to the second microstrip line. The second microstrip line serves as an open stub, and the third microstrip line as a short stub.

Abstract translation: 一种与频率转换器中的本地振荡器一起使用的放大器，包括用于将接收到多个中频频率的频道频率转换的混频器，包括用于放大来自本机振荡器的振荡信号并将放大信号提供给 混频器通过其输出端子和由用于抑制一定范围的中频的分布常数元件组成的陷波电路。 分布常数元件包括与输出端串联连接的第一微带线，与第一微带线串联连接的第二微带线，以及与第二微带线并联连接的第三微带线。 第二条微带线作为开路短路，第三条微带线作短路。