公开(公告)号：EP0180875A3

公开(公告)日：1988-01-20

申请号：EP85113645

申请日：1985-10-26

申请人： INTERSIL INC.

发明人： Doluca, Tunc

IPC分类号： H03F01/08 ,  H03F03/45

CPC分类号： H03F1/086

摘要： An operational amplifier or comparator is provided in which internal parasitic capacitances are buffered to increase the gain bandwidth product of the amplifier.

公开(公告)号：EP0138261A3

公开(公告)日：1987-06-16

申请号：EP84201373

申请日：1984-09-25

申请人： AMERICAN MICROSYSTEMS, INCORPORATED

发明人： Hague, Yusuf ,  Ofner, Erwin

IPC分类号： H03F03/45 ,  H03F01/08

CPC分类号： H03F3/45654 ,  H03F1/086 ,  H03F3/45192 ,  H03F3/45659 ,  H03F2200/153 ,  H03F2203/45424 ,  H03F2203/45651

摘要： A differential operational amplifier is provided with a feedback loop which continuously adjusts the common mode voltage level of the amplifier so that it lies in the center of the dynamic range of the amplifier. The feedback loop measures the instantaneous common mode voltage level and compares it with a reference voltage which is set to reflect the desired common mode voltage. An error signal is generated and fed back into the amplifier to adjust the instantaneous common mode voltage level towards the reference level. Frequency compensation is also provided to overcome the phase shift introduced by the use of RC networks.

公开(公告)号：EP0196631A3

公开(公告)日：1988-08-03

申请号：EP86104252

申请日：1986-03-27

申请人： Zhiwei, Yu

发明人： Zhiwei, Yu

IPC分类号： H03F01/48 ,  H03F03/195 ,  H01L23/56 ,  H03F01/08

CPC分类号： H03F3/195 ,  H03F1/48 ,  Y10T29/4913 ,  Y10T29/49137

摘要： An integrable, high frequency superlinear amplifier and its fabrication method. Which belongs to the basic amplifier fabrication field related to the negative feedback and signal conversion. The adoption of such methods as compromising and the separation of integration may solve the problems in technology like the complication in Kp design, the large quantity of elements, and the difficulties in integration, generalization, the serialised and universal design and fabrication. The amplifiers have following advantages: high frequency, wide band, superlinera, high stability, integration, high reliability, low noise, antigravitation, serialised and universal fabrication, and adjustable impedance without a transformer. It may be used digital pulse amplification and transformation near 10GHZ, in meters, automation, video and audio frequencies, telecommunication systems, fiber optic systems, active analogue computation, and in other cases which call for high requirements such as military and aerospace uses.

摘要翻译： 公开了一种可集成的高频超线性放大器及其制造方法，其与具有负反馈和信号转换的基本放大器制造领域相关。 三级放大器设计涉及具有窄带宽响应的第一级和第二级，以及具有较大或更宽带宽响应的第三放大级。 宽带宽级的带宽使得当两个窄带宽级的增益曲线在第一频率上通过-6dB点时，宽带级的峰值点位于比第一频率高的第二频率 。 宽带宽级利用单个电容器，使得三级的所得曲线在零增益点之下具有近似平坦的部分。 通过反馈配置将网络的阻抗调整到所需的值。

公开(公告)号：EP0188090A3

公开(公告)日：1988-07-27

申请号：EP85309012

申请日：1985-12-11

申请人： NEC CORPORATION

发明人： Okamoto, Toshiyuki

IPC分类号： H03F01/08

CPC分类号： H03F3/45188 ,  H03F1/086 ,  H03F3/3001

摘要： An operational amplifier comprises an initial amplifier stage having a pair of inputs, and a second amplifier stage connected to an output of the initial stage. A phase compensating capacitive element is connected between an output terminal of the second stage and a virtual ground point, and a constant current source is connected to the virtual ground point and the output of the initial stage. A resistive element and a capacitive element are series-connected between the output of the initial stage and the output of the second stage.

公开(公告)号：EP0101201A3

公开(公告)日：1986-08-27

申请号：EP83304191

申请日：1983-07-19

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Akazawa, Yukio ,  Ishihara, Noboru ,  Ohara, Mamoru

IPC分类号： H03F01/48 ,  H03F03/195 ,  H03F01/08

CPC分类号： H03F3/45071 ,  H03F1/48 ,  H03F3/19

摘要： An AC negative feedback circuit (14) includes a semiconductor impedance element (41) connected to an external terminal (11d) on the substrate on which the whole device is formed, and variable control means (20) for adjusting the amount of AC feedback of the high frequency amplifier circuit. As the semiconductor impedance element is used the junction capacitance of a diode (41) under negative bias, diffusion capacitance between the base and emitter electrodes or between the base and collector electrodes of a transistor (51) or a differentiated resistance of a diode (62).