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    • 4. 发明公开
    • A low noise amplifier circuit
    • RauscharmeVerstärkerschaltung
    • EP2913922A1
    • 2015-09-02
    • EP14157220.6
    • 2014-02-28
    • Telefonaktiebolaget L M Ericsson (publ)
    • Sivonen, PeteJussila, JarkkoVilhonen, Sami
    • H03F3/193H03F1/22H03F1/26
    • H03F1/56H03F1/223H03F1/26H03F3/193H03F3/265H03F2200/222H03F2200/294H03F2200/387H03F2200/451H03F2200/489H03F2200/54H03F2200/87H04B1/1036
    • An amplifier (300) for converting a single-ended input signal (V IN ) to a differential output signal (I OUT+ , I OUT- ). The amplifier (300) comprises a first transistor (301), a second transistor (302), a third transistor (303) and a fourth transistor (304). The first transistor (301), configured in common-source or common-emitter mode, receives the single-ended input signal and generate a first part of the differential output signal. The second transistor (302), also configured in common-source or common-emitter mode, generates a second part of the differential output signal. The third and fourth transistor (303,304) are capacitively cross-coupled. The amplifier (300) further comprises inductive degeneration such that a source or emitter of the first transistor (301) is connected to a first inductor (321) and a source or emitter of the second transistor (302) is connected to a second inductor (322).
    • 用于将单端输入信号(V IN)转换为差分输出信号(I OUT +,I OUT-)的放大器(300)。 放大器(300)包括第一晶体管(301),第二晶体管(302),第三晶体管(303)和第四晶体管(304)。 以共源或共发射模式配置的第一晶体管(301)接收单端输入信号并产生差分输出信号的第一部分。 也配置在共源或共发射极模式的第二晶体管(302)产生差分输出信号的第二部分。 第三和第四晶体管(303,304)电容交叉耦合。 放大器(300)还包括电感性退化,使得第一晶体管(301)的源极或发射极连接到第一电感器(321),并且第二晶体管(302)的源极或发射极连接到第二电感器 322)。
    • 5. 发明公开
    • ULTRA-LOW WORKING VOLTAGE RAIL TO RAIL OPERATIONAL AMPLIFIER AND DIFFERENTIAL INPUT AMPLIFICATION-STAGE CIRCUIT AND OUTPUT-STAGE CIRCUIT THEREOF
    • 超低工作电压轨到轨运算放大器和差分输入放大级电路和输出级电路
    • EP3214759A1
    • 2017-09-06
    • EP15854770.3
    • 2015-10-27
    • Huawei Technologies Co. Ltd.
    • TANG, YangyangZHANG, Chenxiong
    • H03F3/45
    • H03F1/0205H03F1/38H03F3/45183H03F3/45219H03F3/45273H03F2200/135H03F2200/153H03F2200/513H03F2200/87H03F2203/45028H03F2203/45036H03F2203/45051H03F2203/45054H03F2203/45114H03F2203/45124H03F2203/45134H03F2203/45221H03F2203/45281H03F2203/45288H03F2203/45342
    • A differential input amplification-stage circuit (100) includes a voltage unit (10), first and second bulk-driven transistors (20, 30), first and second mirror current sources (40, 50), and a differential amplifier unit (60). The voltage unit (10) includes first to third voltage output ends (11, 12, 13). The first voltage output end (11) is connected to the first and the second bulk-driven transistors (20, 30); the first and the second bulk-driven transistors (20, 30) respectively receive first and second input voltages, and converts the first and the second input voltages into first and second output currents; the differential amplifier unit (60) separately outputs first and second adjustment currents under an action of voltages of the first to the third voltage output ends (11, 12, 13); and the first and the second mirror current sources (40, 50) respectively output first and second predetermined currents (I out+ , I out- ) according to the first output current and the first adjustment current, and the second output current and the second adjustment current, so as to maintain transconductance constancy of the differential input amplification-stage circuit (100). Therefore, output stability is improved. In addition, an output-stage circuit (200) and an ultra-low working voltage rail-to-rail transportation amplified circuit (300) are further provided.
    • 本发明的差动输入放大级电路(100)包括电压单元(10),第一和第二体驱动晶体管(20,30),第一和第二镜像电流源(40,50)以及差分放大器单元(60 )。 电压单元(10)包括第一至第三电压输出端(11,12,13)。 第一电压输出端(11)连接到第一和第二体驱动晶体管(20,30)。 第一和第二体驱动晶体管(20,30)分别接收第一和第二输入电压,并且将第一和第二输入电压转换为第一和第二输出电流; 差分放大器单元(60)在第一至第三电压输出端(11,12,13)的电压的作用下分别输出第一和第二调节电流; 并且第一镜像电流源和第二镜像电流源分别根据第一输出电流和第一调节电流以及第二输出电流和第二调节电流输出第一和第二预定电流Iout +,Iout-, 以保持差分输入放大级电路(100)的跨导恒定性。 因此,输出稳定性得到改善。 此外,还提供输出级电路(200)和超低工作电压轨到轨输送放大电路(300)。