公开(公告)号：US06865381B2

公开(公告)日：2005-03-08

申请号：US10388398

申请日：2003-03-17

申请人： Pieter Vorenkamp ,  Klaas Bult ,  Frank Carr

发明人： Pieter Vorenkamp ,  Klaas Bult ,  Frank Carr

IPC分类号： H01F17/00 ,  H01L23/522 ,  H01L27/02 ,  H01L27/08 ,  H03B5/12 ,  H03B5/36 ,  H03D3/18 ,  H03D7/16 ,  H03D7/18 ,  H03G1/00 ,  H03H11/12 ,  H03J1/00 ,  H03J3/04 ,  H03J3/08 ,  H03J3/18 ,  H03L7/10 ,  H03L7/23 ,  H04B1/00

CPC分类号： H03D3/18 ,  H01F17/0006 ,  H01F17/0013 ,  H01F27/34 ,  H01F27/40 ,  H01F27/42 ,  H01F2017/0053 ,  H01F2021/125 ,  H01L23/5227 ,  H01L27/0248 ,  H01L27/0251 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/3011 ,  H03B5/04 ,  H03B5/364 ,  H03D7/161 ,  H03D7/18 ,  H03F1/26 ,  H03F1/3211 ,  H03F3/195 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/111 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2200/447 ,  H03F2200/63 ,  H03F2203/45264 ,  H03F2203/45286 ,  H03G1/0023 ,  H03G1/0029 ,  H03G3/3052 ,  H03H7/25 ,  H03H11/04 ,  H03H11/1291 ,  H03H11/53 ,  H03H11/54 ,  H03H19/004 ,  H03J1/0075 ,  H03J3/04 ,  H03J3/08 ,  H03J3/185 ,  H03J2200/10 ,  H03L7/10 ,  H03L7/183 ,  H03L7/23 ,  H03L2207/06 ,  H01L2924/00

摘要： An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circuitry advantageously uses LC filters integrated onto the substrate in conjunction with image reject mixers to provide sufficient image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. The filters utilize multi track spiral inductors. The filters are tuned using local oscillators to tune a substitute filter, and frequency scaling during filter component values to those of the filter being tuned. In conjunction with filtering, frequency planning provides additional image rejection. The advantageous choice of local oscillator signal generation methods on chip is by PLL out of band local oscillation and by direct synthesis for in band local oscillator. The VCOs in the PLLs are centered using a control circuit to center the tuning capacitance range. A differential crystal oscillator is advantageously used as a frequency reference. Differential signal transmission is advantageously used throughout the receiver.

公开(公告)号：US20050030108A1

公开(公告)日：2005-02-10

申请号：US10665631

申请日：2003-09-22

申请人： Ralph Duncan ,  Tom Kwan

发明人： Ralph Duncan ,  Tom Kwan

IPC分类号： H01F17/00 ,  H01L23/522 ,  H01L27/02 ,  H01L27/08 ,  H03B1/00 ,  H03B5/12 ,  H03B5/36 ,  H03D7/16 ,  H03D7/18 ,  H03G1/00 ,  H03H11/12 ,  H03J1/00 ,  H03J3/04 ,  H03J3/08 ,  H03J3/18 ,  H03L1/02 ,  H03L7/10 ,  H03L7/23 ,  H03L7/00

CPC分类号： H03L7/23 ,  H01F17/0006 ,  H01F17/0013 ,  H01F2017/0053 ,  H01F2021/125 ,  H01L23/5227 ,  H01L27/0248 ,  H01L27/08 ,  H01L2924/0002 ,  H01L2924/09701 ,  H01L2924/3011 ,  H03B5/1209 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/364 ,  H03B2200/0038 ,  H03B2201/025 ,  H03B2201/0266 ,  H03D7/161 ,  H03D7/18 ,  H03G1/0029 ,  H03H11/1291 ,  H03J1/0075 ,  H03J3/04 ,  H03J3/08 ,  H03J3/185 ,  H03J2200/10 ,  H03L1/023 ,  H03L7/10 ,  H01L2924/00

摘要： An integrated VCO having an improved tuning range over process and temperature variations. There is therefore provided in a present embodiment of the invention an integrated VCO. The VCO comprises, a substrate, a VCO tuning control circuit responsive to a VCO state variable that is disposed upon the substrate, and a VCO disposed upon the substrate, having a tuning control voltage input falling within a VCO tuning range for adjusting a VCO frequency output, and having its tuning range adjusted by the tuning control circuit in response to the VCO state variable.

摘要翻译： 具有改进的调谐范围超过过程和温度变化的集成VCO。 因此，在本发明的本实施例中提供了集成VCO。 VCO包括：衬底，响应于设置在衬底上的VCO状态变量的VCO调谐控制电路，以及设置在衬底上的VCO，具有落在VCO调谐范围内的调谐控制电压输入，用于调节VCO频率 输出，并且其调谐范围由调谐控制电路响应于VCO状态变量而调整。

公开(公告)号：US6112070A

公开(公告)日：2000-08-29

申请号：US837095

申请日：1997-04-14

申请人： Tsutomu Katsuyama ,  Hiroshi Andou

发明人： Tsutomu Katsuyama ,  Hiroshi Andou

IPC分类号： H04B1/40 ,  H03J1/00 ,  H03J3/08 ,  H04B1/10 ,  H04B1/18 ,  H04B1/26 ,  H04B1/28

CPC分类号： H03J1/0041 ,  H03J3/08 ,  H04B1/109 ,  H04B1/28

摘要： A receiving wave containing a desired signal and received through an antenna is inputted to an interstage band-pass filter 4 after the component outside a receiving band of the receiving wave has been attenuated by a receiving band-pass filter 2a. A phase locked loop circuit 9 outputs a frequency control voltage corresponding to a selected channel to a voltage control oscillator 8 and also outputs this frequency control voltage to an interstage band-pass filter 4 as a band control voltage thereof. The voltage control oscillator 8 generates a local carrier wave in response to the frequency control voltage. The interstage variable band-pass filter 4 has a passing band width which is a little wider than channel band width and varies its passing band in response to the band control voltage so as to include the selected channel, thereby attenuating the component outside the passing band of the receiving wave inputted from the low noise amplifier 3 and then inputs the receiving wave to a mixer 5. Accordingly, if a frequency which causes a single-signal interference is located in the receiving band apart from the selected channel frequency by a half of the intermediate frequency, the interference wave of this frequency can be attenuated.

摘要翻译： 在接收波段的接收频带外部的分量被接收带通滤波器2a衰减后，包含期望信号并通过天线接收的接收波被输入到级间带通滤波器4。 锁相环电路9将对应于所选通道的频率控制电压输出到电压控制振荡器8，并将该频率控制电压作为其频带控制电压输出到级间带通滤波器4。 电压控制振荡器8根据频率控制电压产生本地载波。 级间可变带通滤波器4具有比通道带宽稍宽的通带宽度，并且响应于频带控制电压而改变其通过频带，以便包括所选择的频道，从而衰减通过频带外的分量 从低噪声放大器3输入的接收波，然后将接收波输入到混频器5.因此，如果导致单信号干扰的频率位于接收频带中，所述接收频带与所选频道频率相隔一半以上 中频，该频率的干扰波可以衰减。

公开(公告)号：US6057735A

公开(公告)日：2000-05-02

申请号：US209051

申请日：1998-12-09

申请人： Mark Cloutier

发明人： Mark Cloutier

IPC分类号： H03G9/06 ,  H03G1/00 ,  H03G3/18 ,  H03G3/30 ,  H03H11/04 ,  H03J3/08 ,  H03J3/18 ,  H03L7/081 ,  H04B1/10 ,  H03G3/10

CPC分类号： H03L7/0814 ,  H03G1/007 ,  H03G3/3036 ,  H03J3/08 ,  H03J3/185 ,  H03L7/0812

摘要： An apparatus and method to obtain a high Q, narrowband active filter with high gain suitable for an integrated circuit implementation. The high Q is achieved via active feedback with an amplitude control loop. The frequency control of the active filter is achieved by means of a frequency locked loop. Both control loops compare the thermal noise of the active filter itself to voltage and frequency references to achieve the stable operating point. Control loops are normally slow relative to the transmitted data, hence avoiding the data altering the operating point of the filter.

摘要翻译： 一种获得具有高增益的高Q，窄带有源滤波器的装置和方法，适用于集成电路实现。 高Q通过具有幅度控制回路的主动反馈来实现。 有源滤波器的频率控制通过锁频环来实现。 两个控制回路将有源滤波器本身的热噪声与电压和频率参考值进行比较，以实现稳定的工作点。 控制回路相对于传输的数据通常较慢，因此避免数据改变过滤器的工作点。

公开(公告)号：US5321852A

公开(公告)日：1994-06-14

申请号：US764834

申请日：1991-09-24

申请人： Chang-yeol Seong

发明人： Chang-yeol Seong

IPC分类号： H04B1/26 ,  H03D3/24 ,  H03G3/20 ,  H03J3/08 ,  H04B1/30 ,  H04N5/21 ,  H04N5/44 ,  H04B1/16

CPC分类号： H03G3/3068 ,  H03D3/242 ,  H03J3/08 ,  H04B1/30

摘要： A device for converting a radio frequency signal directly to a baseband signal includes: a receiving section having a tuner for providing a tuned radio frequency signal and a phase-locked loop for providing a phase-locked signal in response to the tuned radio frequency signal; a frequency oscillating section having a voltage controlled oscillator for providing a specific frequency signal, with a same phase and frequency as the tuned radio frequency signal, in response to the phase-locked signal and a control voltage, and a phase comparator providing the control voltage by comparing the phase of the tuned radio frequency signal and the phase of the specific frequency signal; a baseband section for producing the baseband signal by mixing the tuned radio frequency signal and the specific frequency signal; and a gain control section generating a gain control signal fed back to the baseband section and a delayed gain control signal fed back to the receiving section.

摘要翻译： 用于将射频信号直接转换为基带信号的装置包括：接收部分，具有用于提供调谐射频信号的调谐器和用于响应于所调谐的射频信号提供锁相信号的锁相环; 具有压控振荡器的频率振荡部分，用于响应于锁相信号和控制电压，提供与调谐射频信号相同的相位和频率的特定频率信号，以及提供控制电压的相位比较器 通过比较调谐射频信号的相位和特定频率信号的相位; 基带部分，用于通过混合调谐射频信号和特定频率信号来产生基带信号; 以及增益控制部分，其生成反馈给所述基带部分的增益控制信号和反馈到所述接收部分的延迟增益控制信号。

公开(公告)号：US5210510A

公开(公告)日：1993-05-11

申请号：US644039

申请日：1991-01-22

申请人： Auvo Karsikas

发明人： Auvo Karsikas

IPC分类号： H01P7/00 ,  H03J1/00 ,  H03J3/08

CPC分类号： H01P7/005 ,  H03J1/00 ,  H03J3/08

摘要： The invention relates to a helix resonator used in particular in filters operating at radio frequency. In instances in which conventional procedures based on adjusting the resonance frequency are not sufficient for tuning the resonator, the procedure of the invention can be used in which the resonator is tuned by adjusting the distance of the ground plane (the wall of the resonator cover (1)) from a leg (4) of the resonator or a lead (3), usually a micro strip, with which the resonator has been connected to an external circuit or to another resonator.

公开(公告)号：US5060297A

公开(公告)日：1991-10-22

申请号：US176844

申请日：1988-04-04

申请人： John Y. Ma ,  Bonnie Houston

发明人： John Y. Ma ,  Bonnie Houston

IPC分类号： H03D7/16 ,  H03J3/08 ,  H04B1/18

CPC分类号： H03D7/16 ,  H03J3/08 ,  H04B1/18

摘要： A TVRO receiver for the reception of frequency modulated satellite broadcast signals is provided with the capability of efficiently rejecting image frequencies generated as the received signals undergo intermediate frequency translation. A TVRO tuner, which includes a super-heterodyne circuit having a voltage-controlled oscillator (VCO), means for supplying a controlling tuning voltage to the VCO, and a mixer for combining incoming 1st IF signals with the output frequency of the VCO to reduce the frequency of the 1st IF signals to a selected 2nd IF frequency, is provided with a tracking filter which is adapted to pass only the incoming 1st IF signals and effectively reject any image frequencies generated at the received signal frequencies. The tracking filter comprises at least one low-pass filter section and has a cut-off frequency which is controlled by the same tuning voltage used to regulate the output frequency of the VCO in such a way that the filter rejects frequencies exceeding the VCO output frequency. The filter is designed so that image frequencies, which are generated during the intermediate frequency translation stage as the sum of a given VCO output frequency and the selected 2nd IF frequency, fall substantially beyond the filter cut-off frequency and are thereby attenuated. The tracking filter allows adequate rejection of image frequencies without need for accurate tuning of the low-pass filter sections or precisely matched variable capacitance devices.

摘要翻译： 用于接收频率调制卫星广播信号的TVRO接收机被提供有效地抑制随着接收信号进行中频转换而产生的图像频率的能力。 一种TVRO调谐器，其包括具有压控振荡器（VCO）的超外差电路，用于向VCO提供控制调谐电压的装置，以及用于将输入的第一IF信号与VCO的输出频率组合的混频器，以减少 第一IF信号到选定的第二IF频率的频率具有跟踪滤波器，该跟踪滤波器适于仅通过输入的第一IF信号，并有效地抑制在接收信号频率处产生的任何图像频率。 跟踪滤波器包括至少一个低通滤波器部分，并且具有截止频率，该截止频率由用于调节VCO的输出频率的相同调谐电压控制，使得滤波器抑制超过VCO输出频率的频率 。 滤波器被设计成使得在中频转换级期间产生的图像频率作为给定VCO输出频率和所选择的第二IF频率之和基本上大大超过滤波器截止频率，从而被衰减。 跟踪滤波器允许充分抑制图像频率，而无需精确调谐低通滤波器部分或精确匹配的可变电容器件。

公开(公告)号：US4528698A

公开(公告)日：1985-07-09

申请号：US564130

申请日：1983-12-22

申请人： Robert J. Fraser

发明人： Robert J. Fraser

IPC分类号： H03J3/08 ,  H03J7/02 ,  H04B1/26

CPC分类号： H03J3/08 ,  H03J7/02

摘要： A system is disclosed for tuning a heterodyne receiver. The system preferably includes a voltage tunable preselector filter whose output is applied to a mixer, a voltage tunable injection filter for filtering a local oscillator signal and for applying the filtered signal to the mixer, and tuning control circuitry. The tuning control circuitry senses the power output from the injection filter and develops varying tuning voltages for tuning both filters until a peak output is developed by the injection filter, whereby the filters are tuned for heterodyning an incoming RF signal to a desired IF frequency.

摘要翻译： 公开了一种用于调谐外差接收器的系统。 该系统优选地包括其输出被施加到混频器的电压可调谐预选器滤波器，用于对本地振荡器信号进行滤波并将滤波后的信号施加到混频器的电压可调注入滤波器以及调谐控制电路。 调谐控制电路感测来自注射过滤器的功率输出，并且产生变化的调谐电压以调谐两个滤波器，直到由注入滤波器产生峰值输出，由此滤波器被调谐以将输入的RF信号外插到期望的IF频率。

公开(公告)号：US4368541A

公开(公告)日：1983-01-11

申请号：US164684

申请日：1980-06-30

申请人： Robert M. Evans

发明人： Robert M. Evans

IPC分类号： H04B1/18 ,  H03J3/08 ,  H03J5/02 ,  H04B1/10 ,  H04B1/16 ,  H03J5/24

CPC分类号： H03J5/0263

摘要： A multiplexing arrangement enables a plurality of control voltages for controlling respective ones of a plurality of varactor controlled tunable filters, employed, e.g., prior to the tuner of a television receiver to reject undesired signals, to be generated by a single digital to analog (D/A) converter. A controller, which may, e.g., comprise a microcomputer, sequentially applies digital control words to the D/A converter and substantially synchronously causes the resultant control voltages generated by the D/A converter to be applied, through respective switches to the tunable filters. The control voltages are applied to capacitors connected to d.c. control lines for the tunable filters. The high impedance of the varactor diodes included in the filters enables the capacitors to store respective control voltages for relatively long intervals before the control voltages need to be refreshed. This enables a large number of tunable filters to be controlled by a single D/A converter.

摘要翻译： 多路复用布置使多个控制电压能够控制多个变容二极管控制的可调谐滤波器中的各个控制电压，例如在电视接收机的调谐器之前采用，以排除不想要的信号，由单个数字模拟（D / A）转换器。 可以例如包括微计算机的控制器顺序地将数字控制字施加到D / A转换器，并且通过相应的开关到基本上同步地使得由D / A转换器产生的合成控制电压被施加到可调谐滤波器。 控制电压被施加到连接到直流电容器的电容器上。 可调滤波器的控制线。 包括在滤波器中的变容二极管的高阻抗使得电容器能够在需要刷新控制电压之前存储相对长的间隔的相应控制电压。 这使得可以通过单个D / A转换器来控制大量可调谐滤波器。

公开(公告)号：US4181890A

公开(公告)日：1980-01-01

申请号：US923621

申请日：1978-07-11

申请人： Kenji Yamamoto

发明人： Kenji Yamamoto

IPC分类号： B60J7/10 ,  B60J7/04 ,  B60J7/08 ,  B60J7/185 ,  H03D5/00 ,  H03J3/08 ,  H03J5/00 ,  H03J5/02 ,  H03J5/26 ,  H03J7/18 ,  H04B1/16 ,  H04B1/26 ,  H04B1/28

CPC分类号： H03D5/00 ,  H03J3/08 ,  H03J5/0272 ,  H03J5/26 ,  H04B1/16

摘要： Radio receiving apparatus for receiving signals in plural frequency bands. Plural signal processing channels are provided, each channel being associated with a respective frequency band and each being tunable to different frequencies within its associated band to derive information signals when tuned to broadcast frequencies. Depending upon which of the signal processing channels is tuned to a broadcast frequency, a controllable switch connects that channel to an output circuit so as to supply the derived information signals thereto. A pulse generator generates intermittent pulse signals when the tuning condition of at least one of the signal processing channels is changed. These pulse signals are used to sample the tuning condition of that signal processing channel to determine if that channel is tuned to a broadcast frequency. A switch control circuit controls the switch to connect to the output circuit the particular signal processing channel which is tuned to a broadcast frequency.

摘要翻译： 用于在多个频带中接收信号的无线电接收装置。 提供了多个信号处理信道，每个信道与相应的频带相关联，并且每个信道可调谐到其相关频带内的不同频率，以在调谐到广播频率时导出信息信号。 根据哪个信号处理通道调谐到广播频率，可控开关将该通道连接到输出电路，以便将导出的信息信号提供给输出电路。 当信号处理通道中的至少一个的调谐条件改变时，脉冲发生器产生间歇脉冲信号。 这些脉冲信号用于对该信号处理通道的调谐条件进行采样，以确定该通道是否被调谐到广播频率。 开关控制电路控制开关以将调谐到广播频率的特定信号处理信道连接到输出电路。