-
公开(公告)号：US07589579B2
公开(公告)日：2009-09-15
申请号：US11911326
申请日：2006-04-04
CPC分类号： H03D7/1433 , H03D7/1408 , H03D7/1425 , H03D7/1458 , H03D7/1475
摘要： A sub-harmonic 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 (il , 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 (LO0) respective and a second transistor (Q4) for receiving a second local oscillator signal (LO180), 180 degrees out of phase with the first local oscillator signal, such that a modulating current signal (iO), having twice the local oscillator frequency is superimposed onto the output currents.
摘要翻译： 具有输入级（52）和电流调制级（64）的亚谐波混频电路，输入级（52）以第一频率接收RF输入信号（RF +，RF-），并产生输出电流 电流调制级（64）包括用于接收第一本地振荡器信号（LO0）的第一晶体管（Q3）和用于接收第二本地振荡器的第二晶体管（Q4） 信号（LO180）与第一本机振荡器信号相差180度，使得具有两倍本地振荡器频率的调制电流信号（iO）叠加到输出电流上。
-
公开(公告)号：US06181207B2
公开(公告)日：2001-01-30
申请号：US09425656
申请日：1999-10-22
IPC分类号： H03F138
CPC分类号： H03F3/343 , H03F2200/294 , H03F2200/372
摘要： A current amplifier A1 includes two transistors Q1 and Q2 whose emitters are interconnected via a resistor R1. The input of the current amplifier is constituted by the emitter of the first transistor Q1, whose collector is connected to the output terminal of the amplifier A1 via a second resistor R2, and to the first resistor R1 via the main current path of the second transistor Q2. The current amplifier A1 has a simple structure and a low input impedance, as well as an easily controllable gain.
摘要翻译： 电流放大器A1包括两个晶体管Q1和Q2，其发射极经由电阻器R1互连。 电流放大器的输入由第一晶体管Q1的发射极构成，第一晶体管Q1的集电极经由第二电阻器R2连接到放大器A1的输出端，并经由第二晶体管Q1的主电流通路连接至第一电阻R1。 Q2。 电流放大器A1具有简单的结构和低的输入阻抗，以及容易控制的增益。
-
公开(公告)号：US5825231A
公开(公告)日：1998-10-20
申请号：US110038
申请日：1993-08-20
CPC分类号： H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D2200/0033 , H03D2200/0043
摘要： An integratable transformer circuit for converting an asymmetrical input signal into a pair of symmetrical output signal currents and requiring only one IC connection pin. The circuit exhibits a low input impedance combined with good noise, gain and intermodulation performance up to high frequencies. The asymmetrical input terminal of the circuit is coupled to a node commonly coupled to the emitter of a common base transistor and to the base of a common emitter transistor. The common base transistor acts as a non-inverting current follower, the common emitter transistor as an inverting transimpedance amplifier. An input signal current is transferred to a first symmetrical output terminal via the node and the common base transistor, thereby producing a signal voltage at the node. This signal voltage modulates the collector current of the common emitter transistor, which is in phase opposition to the input signal current and is transferred to the second output terminal.
摘要翻译： 一种用于将不对称输入信号转换为一对对称输出信号电流并且仅需要一个IC连接引脚的可积分变压器电路。 该电路具有低输入阻抗，并具有高达高频的良好噪声，增益和互调性能。 电路的非对称输入端子耦合到共同耦合到公共基极晶体管的发射极和公共发射极晶体管的基极的节点。 公共基极晶体管用作非反相电流跟随器，公共发射极晶体管作为反相跨阻放大器。 输入信号电流通过节点和公共基极晶体管传送到第一对称输出端，从而在节点处产生信号电压。 该信号电压调制公共发射极晶体管的集电极电流，该集电极电流与输入信号电流相反，并被传送到第二输出端子。
-
公开(公告)号：US4586064A
公开(公告)日：1986-04-29
申请号：US539446
申请日：1983-10-06
IPC分类号： H01L29/762 , H01L21/339 , H01L27/148 , H01L29/06 , H01L29/40 , H01L29/423 , H01L29/43 , H01L29/49 , H01L29/768 , H01L29/78 , H01L29/04 , H01L27/04
CPC分类号： H01L29/4983 , H01L29/402 , H01L29/405 , H01L29/42396 , H01L29/435 , H01L29/4916 , H01L29/76841 , H01L29/7802 , H01L29/7816 , H01L29/7835
摘要： By the use of high-resistivity polycrystalline silicon (poly) in MIS elements, a depletion layer can be formed in the poly material which brings about an electric decoupling between the poly (gate) and the underlying semiconductor body. This effect can be utilized advantageously in various circuit elements, such as in CCD's, in order to obtain a favorable potential distribution in the substrate; in MOS transistors in order to reduce the parasitic capacities; and in high-voltage devices in order to increase the breakdown voltage at the edge of the field plate (resurf).
摘要翻译： 通过在MIS元件中使用高电阻率多晶硅（poly），可以在多晶硅材料中形成耗尽层，这导致多晶硅（gate）和下面的半导体本体之间的电去耦合。 为了在衬底中获得有利的电位分布，这种效果可以有利地用于诸如CCD中的各种电路元件中。 在MOS晶体管中，以减少寄生电容; 并在高电压设备中增加在场板边缘的击穿电压（resurf）。
-
15.发明授权
公开(公告)号：US4143387A
公开(公告)日：1979-03-06
申请号：US804576
申请日：1977-06-08
申请人： Eduard F. Stikvoort
发明人： Eduard F. Stikvoort
IPC分类号： H01L29/423 , H01L29/43 , H01L29/78 , H03D7/12
CPC分类号： H01L29/7816 , H01L29/42396 , H01L29/435 , H01L29/7801 , H03D7/125
摘要： A mixer comprises a MOS transistor having an ideal quadratic characteristic. The transistor is of the D-MOST type and comprises a resistive gate across which a voltage drop is applied transversely to the longitudinal direction of the channel. The adjustment point of the transistor is chosen to be so that the range of the gate voltages between the threshold voltage and the voltage at which the slope reaches the saturation value is always situated during operation within the voltage drop across the gate electrode. The signals to be mixed are introduced capacitively via a second gate electrode situated above the resistive gate electrode and capacitively coupled therewith.
-
公开(公告)号：US20090295454A1
公开(公告)日：2009-12-03
申请号：US11720318
申请日：2005-11-24
IPC分类号： G06F7/44
CPC分类号： H03F3/45085 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D7/1491 , H03F2200/294 , H03F2200/372 , H03F2200/513 , H03F2203/45374 , H03F2203/45644
摘要： A mixer circuit (102) for use in radio frequency (RF) equipment is disclosed. The mixer comprises a current source (Io) and a differential amplifier (Q1, Q2) connected to the current source and having input terminals (RF+, RF−) for receiving an RF input signal and output terminals (IF+, IF−) for providing an intermediate frequency signal. A local oscillator signal (LO) is applied to a transistor (Q3) connected in parallel with the differential amplifier to adjust the current flowing in the differential amplifier such that the differential output signal contains components having frequencies at the sum and difference frequencies of the RF and local oscillator signals. Emitter degeneration resistors (R1) and a transistor Q4 for diverting part of the current to the supply improve the linearity of the mixer.
摘要翻译： 公开了一种用于射频（RF）设备的混频器电路（102）。 混频器包括连接到电流源的电流源（Io）和差分放大器（Q1，Q2），并且具有用于接收RF输入信号的输入端（RF +，RF-）和用于提供的RF输入信号的输出端（IF +，IF-） 中频信号。 将本地振荡器信号（LO）施加到与差分放大器并联连接的晶体管（Q3），以调节在差分放大器中流动的电流，使得差分输出信号包含频率为RF和 和本地振荡器信号。 发射极退化电阻（R1）和用于将电流的一部分转向电源的晶体管Q4改善了混频器的线性。
-
公开(公告)号：US20090121789A1
公开(公告)日：2009-05-14
申请号：US11994783
申请日：2006-07-03
CPC分类号： H03F3/45 , H03F2200/372
摘要： Devices (1,2) comprising feedback-less amplifiers (16,19,26,29) that are gain controlled introduce linear relationships between output signals and input signals of the feedback—less amplifiers (16,19,26,29) by providing the feedback—less amplifiers (16,19,26,29) sub-circuits in the form of first transistors (33) operated in their triode regions for receiving input signals and second sub-circuits in the form of second transistors (34) for receiving control signals and third sub-circuits in the form of resistors (35) for generating output signals, whereby the respective first and second and third sub-circuits form a serial path. Second circuits (4) receive gain signals and convert the gain signals into the control signals. The control signals are copies of the gain signals. The second circuits (4) comprise current sources (6) and third and fourth transistors (41,42). The current sources (6) comprise fifth and sixth transistors (61,62). The second circuits (4) further comprise voltage sources (9) further current sources. Third circuits (8) compensate common mode currents.
摘要翻译： 包括无增益控制放大器（16,19,26,29）的设备（1,2），其被增益控制通过提供无反馈放大器（16,19,26,29）的输出信号和输入信号之间的线性关系来引入 在第三晶体管（33）的形式的无反馈放大器（16,19,26,29）子电路在其三极管区域中工作以接收输入信号，第二晶体管（34）形式的第二子电路用于 以电阻器（35）的形式接收控制信号和第三子电路，用于产生输出信号，由此相应的第一和第二和第三子电路形成串行路径。 第二电路（4）接收增益信号并将增益信号转换成控制信号。 控制信号是增益信号的副本。 第二电路（4）包括电流源（6）和第三和第四晶体管（41,42）。 电流源（6）包括第五和第六晶体管（61,62）。 第二电路（4）还包括电压源（9）的另外的电流源。 第三回路（8）补偿共模电流。
-
公开(公告)号：US06324233B1
公开(公告)日：2001-11-27
申请号：US09120625
申请日：1998-07-22
申请人： Adrianus Sempel , Eduard F. Stikvoort , Alphons A. M. L. Bruekers , Adrianus W. M. van den Enden , Rudy J. van de Plassche , Gerardus C. M. Gielis
发明人： Adrianus Sempel , Eduard F. Stikvoort , Alphons A. M. L. Bruekers , Adrianus W. M. van den Enden , Rudy J. van de Plassche , Gerardus C. M. Gielis
IPC分类号： H04B1400
CPC分类号： H04N5/4446 , H04B1/1036 , H04B1/26 , H04N5/4401 , H04N5/46
摘要： In a receiver for receiving a modulated carrier (MC) having asymmetrical sidebands (USB,LSB), for example, a TV signal, a synchronous demodulator (SDEM) derives a vectorial baseband signal (VB) from the modulated carrier (MC). A filter (FILT) filters the vectorial baseband signal so as to compensate for the sideband asymmetry, for example, by means of a Nyquist slope. Thus, the sideband asymmetry is compensated at baseband frequencies, rather than at an intermediate frequency, which allows a better quality of reception.
摘要翻译： 在用于接收具有不对称边带（USB，LSB）的例如TV信号的调制载波（MC）的接收机中，同步解调器（SDEM）从调制载波（MC）导出矢量基带信号（VB）。 滤波器（FILT）对矢量基带信号进行滤波，以便例如通过奈奎斯特斜率补偿边带不对称性。 因此，边带不对称性在基带频率而不是中频处得到补偿，这允许更好的接收质量。
-
公开(公告)号：US06236847B1
公开(公告)日：2001-05-22
申请号：US09050594
申请日：1998-03-30
申请人： Eduard F. Stikvoort
发明人： Eduard F. Stikvoort
IPC分类号： H04B126
CPC分类号： H03D7/166 , H03H7/06 , H03H7/21 , H03H2007/0192
摘要： In a receiver the input signal is converted by a mixer into two quadrature IF signals. The quadrature IF signals are amplified by an amplifier and filtered by a filter. A polyphase filter suppresses signals having frequencies above a predetermined frequency. A second mixer converts the filtered IF signal into a second IF signal. This second IF signal is filtered by a second polyphase filter which suppresses signals having a frequency below a predetermined frequency. In this way a band-pass transfer function is obtained having a first edge defined by the first polyphase filter and having the second defined by the second polyphase filter. In an embodiment of the invention, the cut off frequencies of the polyphase filters are equal to zero, resulting in a transfer function for the complete receiver having cut off frequencies independent from the component values use in the polyphase filters.
摘要翻译： 在接收机中，输入信号由混频器转换成两个正交IF信号。 正交IF信号由放大器放大并由滤波器滤波。 多相滤波器抑制频率高于预定频率的信号。 第二混频器将滤波的IF信号转换成第二IF信号。 该第二IF信号被抑制频率低于预定频率的信号的第二多相滤波器滤波。 以这种方式，获得具有由第一多相滤波器限定的第一边缘并且具有由第二多相滤波器限定的第二边缘的带通传递函数。 在本发明的一个实施例中，多相滤波器的截止频率等于零，导致具有独立于多相滤波器中使用的分量值的截止频率的完整接收机的传递函数。
-
公开(公告)号：US5764171A
公开(公告)日：1998-06-09
申请号：US626530
申请日：1996-04-02
申请人： Eduard F. Stikvoort
发明人： Eduard F. Stikvoort
CPC分类号： H03C3/40 , H03D3/007 , H03M3/40 , H04L27/2332 , H03H2011/0494 , H03M3/422 , H03M3/436 , H03M3/456
摘要： A receiver including two sigma delta modulators used to convert a pair of analog quadrature signals into digital quadrature signals. In such sigma delta modulators the quantization noise is shifted into a frequency region in which no signal is present. A cross coupling between the filters is provided to improve the noise reduction without increasing the order of the filters. By providing the cross coupling, it is possible to obtain complex poles and zeros in the noise transfer function which do not have to appear in complex conjugate pairs which results in an increase of the noise suppression in a specified frequency range.
摘要翻译： 包括用于将一对模拟正交信号转换成数字正交信号的两个Σ-Δ调制器的接收机。 在这样的Σ-Δ调制器中，量化噪声被转移到不存在信号的频率区域。 提供滤波器之间的交叉耦合以提高噪声降低而不增加滤波器的次序。 通过提供交叉耦合，可以在不需要出现在复共轭对中的噪声传递函数中获得复极点和零，这导致在指定频率范围内的噪声抑制的增加。
-
-
-
-
-
-
-
-
-
搜索结果
33 条记录 (耗时 0.015 秒)
