-
公开(公告)号：US5404058A
公开(公告)日：1995-04-04
申请号：US281344
申请日：1994-07-27
申请人： Kazunori Nishijima
发明人： Kazunori Nishijima
CPC分类号： G01R19/32
摘要： A level detecting circuit includes an operational amplifier, a first resistor, a first series circuit of second and third resistors, a fourth resistor, and a second series circuit of fifth and sixth resistors. The operational amplifier receives differential outputs from an AGC detecting circuit as inverting and non-inverting inputs. The first resistor is connected between one differential output of the AGC detecting circuit and the inverting input of the operational amplifier. The first series circuit is inserted in a negative feedback loop between an output of the operational amplifier and the inverting input of the operational amplifier. The fourth resistor is connected between the other differential output of the AGC detecting circuit and the non-inverting input of the operational amplifier. The second series circuit is connected between a bias voltage and the non-inverting input of the operational amplifier. The resistances of the first and fourth resistors and resistances of the second, third, fifth, and sixth are respectively set to be the same, and a temperature coefficient of each of the first, second, fourth, and fifth resistors and a temperature coefficient of each of the third and sixth resistors are set to have the same absolute value and opposite polarities.
摘要翻译： 电平检测电路包括运算放大器，第一电阻器，第二和第三电阻器的第一串联电路，第四电阻器和第五和第六电阻器的第二串联电路。 运算放大器从AGC检测电路接收差分输出作为反相和非反相输入。 第一个电阻连接在AGC检测电路的一个差分输出端和运算放大器的反相输入端之间。 第一串联电路插入在运算放大器的输出端和运算放大器的反相输入端之间的负反馈回路中。 第四电阻连接在AGC检测电路的另一差分输出端和运算放大器的非反相输入端之间。 第二串联电路连接在运算放大器的偏置电压和非反相输入端之间。 第一和第四电阻器的电阻和第二，第三，第五和第六电阻器的电阻分别设置为相同，并且第一，第二，第四和第五电阻器中的每一个的温度系数和温度系数 第三和第六电阻器中的每一个被设置为具有相同的绝对值和相反的极性。
-
公开(公告)号：US5151667A
公开(公告)日：1992-09-29
申请号：US701912
申请日：1991-05-17
申请人： Kazunori Nishijima
发明人： Kazunori Nishijima
CPC分类号： H03L1/022 , H03B5/1209 , H03B5/1231 , H03B5/1243 , H03B5/1293 , H03B5/04
摘要： An oscillation circuit has a differential amplifier including a constant current source formed by a resistor and a transistor whose emitter is grounded through the resistor, and a feedback circuit through which an output of the differential amplifier is positively fed back to an input of the same differential amplifier. The oscillation circuit further includes a band-gap regulator for producing a band-gap voltage proportional to a thermal voltage of transistors forming the band-gap regulator whose emitter areas are different with each other, and an operational amplifier for DC-amplifying the band-gap voltage and applying the amplified band-gap voltage to the base of the transistor forming the constant current source. The oscillation circuit is capable of performing a stable oscillation against a wide range of temperature changes.
-
公开(公告)号：US5559836A
公开(公告)日：1996-09-24
申请号：US372859
申请日：1995-01-13
申请人： Kazunori Nishijima
发明人： Kazunori Nishijima
摘要： A pulse sensor for sensing keyed pulses for a keyed AFC which is used in a hi-vision satellite broadcast receiver, has a differentiating circuit that differentiates pulse signals supplied thereto so as to be amplified by a dc amplifier. The amplified signal is transformed by a window comparator such that a resultant signal having a fixed voltage level is output as a pulse sense signal. The sensor circuit is simplified and can be easily manufactured in an integrated circuit configuration.
摘要翻译： 一种用于感测用于高保真卫星广播接收机的键控AFC的键控脉冲的脉冲传感器具有微分电路，其将提供给其的脉冲信号区分，以便由直流放大器放大。 放大的信号由窗口比较器变换，使得具有固定电压电平的合成信号被输出为脉冲检测信号。 传感器电路简化，可以容易地以集成电路配置制造。
-
公开(公告)号：US5122760A
公开(公告)日：1992-06-16
申请号：US702815
申请日：1991-05-17
申请人： Kazunori Nishijima
发明人： Kazunori Nishijima
摘要： A detector for use in an automatic gain control amplifier and operated to generate a gain control voltage in response to an amplitude of the output signal of an amplifier circuit includes five transistors connected in a detector circuit. The first transistor receives a bias voltage at its base and the second transistor receives a true signal of an input signal along with the bias voltage at its base. The third transistor receives a complementary signal of the input signal along with the bias voltage at its base. A first current source is connected in common to the emitters of the first to third transistors. A control voltage is supplied between the bases of the fourth and fifth transistors. A second current source supplies an operating current to the fourth and fifth transistors. A first load is connected in common to the collectors of the first and the fourth transistors. A second load is connected in common to the collectors of the second, third and fifth transistors. A first output terminal of the detector is connected to the collectors of the first and fourth transistors, and a second output terminal of the detector is connected to the collectors of the second, third and fifth transistors. The detector reduces or eliminates temperature dependence of the amplitude of the output of the amplifier circuit.
-
公开(公告)号：US5254956A
公开(公告)日：1993-10-19
申请号：US889044
申请日：1992-05-29
申请人： Kazunori Nishijima
发明人： Kazunori Nishijima
CPC分类号： H03F3/45511 , H03F2203/45006 , H03F2203/45008 , H03F2203/45036 , H03F2203/45068 , H03F2203/45074 , H03F2203/45076 , H03F2203/45082 , H03F2203/45202 , H03F2203/45212 , H03F2203/45402 , H03F2203/45424 , H03F2203/45702
摘要： There is provided a composite differential amplifier with a lower voltage and a lower power consumption of the circuit thereof. An output of a differential amplifier is inputted into an emitter-follower and is delivered as a DC voltage from an emitter of each of transistors of the emitter-follower to a non-inverting input terminal or an operational amplifier. Then, an output of the operational amplifier is supplied to a variable current source. The variable current source at its current drain side is connected to a resistance side of the differential amplifier so that an external control voltage inputted to the non-inverting input side of the operational amplifier is equal to the DC output voltage of the differential amplifier.
-
公开(公告)号：US4694204A
公开(公告)日：1987-09-15
申请号：US706597
申请日：1985-02-28
CPC分类号： H04L27/2273 , G06G7/163 , H03L7/087 , H04L2027/0048 , H04L2027/0067
摘要： A transistor circuit for a signal multiplier used in, for example, a demodulator by means of the Costas loop method is disclosed. The transistor circuit comprises first to third circuit stages each including first and second transistors coupled in a differential form. The first to third circuit stages are connected in tandem with one another such that the output signal current of each circuit stage is supplied to the succeeding circuit stage without a substantial change. Further, each of the first to third circuit stages is supplied with one of or both of two input signals P and Q. As a result, the transistor circuit produces an output signal representing a signal multiplication: P.times.Q.times.(P+Q).times.(P-Q).
摘要翻译： 公开了一种用于例如通过科斯塔斯循环方法解调器的信号倍增器的晶体管电路。 晶体管电路包括第一至第三电路级，每个级包括以差分形式耦合的第一和第二晶体管。 第一至第三电路级彼此串联连接，使得每个电路级的输出信号电流被提供给后续电路级而没有实质变化。 此外，第一至第三电路级中的每一个被提供有两个输入信号P和Q中的一个或两者。结果，晶体管电路产生表示信号乘法的输出信号：PxQx（P + Q）×（PQ ）。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.009 秒)
