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公开(公告)号：US07952421B2
公开(公告)日：2011-05-31
申请号：US11719209
申请日：2005-11-08
IPC分类号： H01L35/00
CPC分类号： G05F3/262
摘要： The present invention relates to an improved PTAT current source and a respective method for generating a PTAT current. Opportune collector currents are generated and forced in two transistors exploiting the logarithmic relation between the base-emitter voltage and the collector current of a transistor. A resistor senses a voltage difference between the base-emitter voltages of the two transistors, which can have either the same or different areas. A fraction of the current flowing through the resistor is forced into a transistor collector and mirrored by an output transistor for providing an output current. By this principle an all npn-transistor PTAT current source can be provided that does not need pup transistors as in conventional PTAT current sources. The invention is generally applicable to a variety of different types of integrated circuits needing a PTAT current reference, especially in modern advanced technologies as InP and GaAs where p-type devices are not available. For example, the PTAT current source circuit of the invention can be used in radio frequency power amplifiers, in radio frequency tag circuits, in a satellite microwave front-end.
摘要翻译： 本发明涉及一种改进的PTAT电流源和用于产生PTAT电流的相应方法。 利用晶体管的基极 - 发射极电压和集电极电流之间的对数关系，两个晶体管产生并强制采集集电极电流。 电阻器感测两个晶体管的基极 - 发射极之间的电压差，其可以具有相同或不同的面积。 流过电阻器的电流的一小部分被迫进入晶体管集电极并由输出晶体管镜像，以提供输出电流。 通过该原理，可以提供所有npn晶体管PTAT电流源，其不像传统的PTAT电流源那样不需要小型晶体管。 本发明通常适用于需要PTAT电流参考的各种不同类型的集成电路，特别是在p型器件不可用的InP和GaAs的现代先进技术中。 例如，本发明的PTAT电流源电路可以用于卫星微波前端的射频功率放大器，射频标签电路中。
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公开(公告)号：US20120119840A1
公开(公告)日：2012-05-17
申请号：US13332932
申请日：2011-12-21
IPC分类号： H04L27/34
CPC分类号： H03C5/00
摘要： The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance with the phase modulation and amplitude modulation components by using a differential power amplifier circuitry(30) and supplying an amplified phase modulation component to a differential input of the differential power amplifier circuitry(30). A bias input of the differential power amplifier circuitry(30) is controlled based on the amplitude modulation component, so as to modulate a common-mode current of the differential power amplifier circuitry(30). Thereby, a new concept of a polar modulator with static DC-DC converter and power and/or efficiency and/or linearity controlled output power amplifier can be achieved.
摘要翻译： 本发明涉及极化调制装置和方法，其中基于输入信号的分别处理的相位调制（PM）和调幅（AM）分量产生极调调制信号。 通过使用差分功率放大器电路（30）根据相位调制和幅度调制分量产生放大的极化调制输出信号，并将放大的相位调制分量提供给差分功率放大器电路（30）的差分输入。 基于幅度调制分量来控制差分功率放大器电路（30）的偏置输入，以便调制差分功率放大器电路（30）的共模电流。 因此，可以实现具有静态DC-DC转换器和功率和/或效率和/或线性控制的输出功率放大器的极性调制器的新概念。
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公开(公告)号：US20090219105A1
公开(公告)日：2009-09-03
申请号：US12093704
申请日：2006-11-01
IPC分类号： H04L27/34
CPC分类号： H03C5/00
摘要： The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance with the phase modulation and amplitude modulation components by using a differential power amplifier circuitry (30) and supplying an amplified phase modulation component to a differential input of the differential power amplifier circuitry (30). A bias input of the differential power amplifier circuitry (30) is controlled based on the amplitude modulation component, so as to modulate a common-mode current of the differential power amplifier circuitry (30). Thereby, a new concept of a polar modulator with static DC-DC converter and power and/or efficiency and/or linearity controlled output power amplifier can be achieved.
摘要翻译： 本发明涉及极化调制装置和方法，其中基于输入信号的分别处理的相位调制（PM）和调幅（AM）分量产生极调调制信号。 通过使用差分功率放大器电路（30）根据相位调制和幅度调制分量产生放大的极化调制输出信号，并将放大的相位调制分量提供给差分功率放大器电路（30）的差分输入。 基于幅度调制分量来控制差分功率放大器电路（30）的偏置输入，以便调制差分功率放大器电路（30）的共模电流。 因此，可以实现具有静态DC-DC转换器和功率和/或效率和/或线性控制的输出功率放大器的极性调制器的新概念。
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公开(公告)号：US20080284488A1
公开(公告)日：2008-11-20
申请号：US11911326
申请日：2006-04-04
IPC分类号： G06G7/16
CPC分类号： H03D7/1433 , H03D7/1408 , H03D7/1425 , H03D7/1458 , H03D7/1475
摘要： A subharmonic mixer circuit having an input stage (52) and a current modulating stage (64) is disclosed. The input stage (52) receives an RF input signal (RF+, RF−) at a first frequency and generates output currents (i1, i2) varying in dependence upon the Rf input signal. The current modulating stage (64) comprises a first transistor (Q3) for receiving a first local oscillator signal (LOO) respective and a second transistor (Q4) for receiving a second local oscillator signal (LOI 80), 180 degrees out of phase with the first local oscillator signal, such that a modulating current signal (i0), having twice the local oscillator frequency, is superimposed onto the output currents.
摘要翻译： 公开了具有输入级（52）和电流调制级（64）的次谐波混频电路。 输入级（52）以第一频率接收RF输入信号（RF +，RF-），并产生根据Rf输入信号变化的输出电流（i 1，i 2）。 电流调制级（64）包括用于接收相应的第一本地振荡器信号（LOO）的第一晶体管（Q 3）和用于接收第二本地振荡器信号（LOI 80）的第二晶体管（Q 4） 与第一本地振荡器信号相位，使得具有两倍本地振荡器频率的调制电流信号（i 0）被叠加到输出电流上。
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