公开(公告)号：US5113094A

公开(公告)日：1992-05-12

申请号：US492763

申请日：1990-03-13

Applicant: Martin I. Grace ,  Peter M. Kapetanic ,  Eric C. Liu

Inventor： Martin I. Grace ,  Peter M. Kapetanic ,  Eric C. Liu

IPC: H03D7/02

CPC classification number: H03D7/02

Abstract: A method and apparatus comprising a sampler frequency converter having a first and a second diode. A local oscillator having a frequency F.sub.LO, a step recovery diode and a balun transformer are used for providing positive and negative sampling pulses to the diodes for sampling an input signal applied to the diodes having a frequency F.sub.IN. An output signal is provided by the diodes having a frequency F.sub.OUT which is defined by the relationship F.sub.OUT .vertline.F.sub.IN .+-.N.times.F.sub.LO .vertline. where N is an integer harmonic number 1, 2, 3 . . . and the output signal has an amplitude which varies as a function of (sin x)/x where x=F.sub.IN. A bandpass filter is provided which is responsive to the output signal for filtering a predetermined band of frequencies therefrom and a bias circuit is provided for forward biasing the diodes so that the frequency F.sub.IN of said input signal at which nulls occur in said (sin x)/x relationship occur at a lower frequency after said biasing than before said biasing.

Abstract translation: 一种包括具有第一和第二二极管的采样器频率转换器的方法和装置。 具有频率FLO，阶跃恢复二极管和平衡不平衡变压器的本地振荡器用于向二极管提供正和负采样脉冲，以对施加到具有频率FIN的二极管的输入信号进行采样。 输出信号由具有频率FOUT的二极管提供，频率FOUT由关系FOUT|FIN +/- NxFLO|定义，其中N是整数谐波数1,2,3。 。 。 并且输出信号具有作为（sin x）/ x的函数而变化的幅度，其中x = FIN。 提供带通滤波器，其响应于输出信号用于滤波预定的频带，并且提供偏置电路用于正向偏置二极管，使得所述输入信号的频率FIN在所述（sin x） / x关系发生在所述偏压之后的较低频率，而不是在所述偏压之前。

公开(公告)号：US5059915A

公开(公告)日：1991-10-22

申请号：US444711

申请日：1989-12-01

Applicant: Martin I. Grace ,  Peter M. Kapetanic

Inventor： Martin I. Grace ,  Peter M. Kapetanic

IPC: G01R27/28

CPC classification number: G01R27/28

Abstract: A vector network analyzer comprising a circuit for measuring the real and imaginary components of the central spectral line in an RF pulse from a device-under-test is provided. The circuit comprises a modulator in response to a profiling pulse for modulating the amplitude of the RF pulse, mixers for down-converting the frequency of the amplitude modulated RF pulse, a narrow band filter for filtering the RF pulse having a bandwidth of 500 Hz and a synchronous detector responsive to the output of the crystal filter for providing a pair of dc outputs, which correspond to the real and imaginary components of the output of the device under test as the profiling pulse is shifted in time relative to the RF pulse.

Abstract translation: 提供了一种矢量网络分析器，其包括用于测量来自被测器件的RF脉冲中的中心谱线的实部和虚部的电路。 该电路包括响应于用于调制RF脉冲的幅度的轮廓脉冲的调制器，用于下变频调幅RF脉冲的频率的混频器，用于滤波具有500Hz带宽的RF脉冲的窄带滤波器，以及 响应于晶体滤波器的输出的同步检测器，用于提供一对直流输出，其对应于随着仿真脉冲相对于RF脉冲在时间上移位而被测器件的输出的实部和虚部分量。

公开(公告)号：US20110098014A1

公开(公告)日：2011-04-28

申请号：US12604286

申请日：2009-10-22

Applicant: Jon S. Martens ,  Oggi P. Lin ,  Thomas J. Albrecht ,  Peter M. Kapetanic

Inventor： Jon S. Martens ,  Oggi P. Lin ,  Thomas J. Albrecht ,  Peter M. Kapetanic

IPC: H04B1/10

CPC classification number: H04B15/06

Abstract: A system and method for implementing dynamic spur avoidance in a high speed receiver environment is provided. For a plurality of radio frequency (RF) input signal ranges, a range of intermediate frequency (IF) signals and a noise floor for each IF signal is determined. An identification of spurs that will affect the noise floor is also determined from a look up table for each range of the RF inputs. A frequency plan that sets local oscillator and constituent oscillator signals is selected such that the IF signals generated from the RF input will avoid lower order spurious responses of the identified spurs within the IF signal range.

Abstract translation: 提供了一种用于在高速接收机环境中实现动态无回避的系统和方法。 对于多个射频（RF）输入信号范围，确定每个IF信号的中频（IF）信号的范围和本底噪声。 对于每个RF输入范围的查找表，也会确定影响本底噪声的杂散。 选择设置本地振荡器和组成振荡器信号的频率计划，使得从RF输入产生的IF信号将避免在IF信号范围内所识别的杂波的较低阶杂散响应。

公开(公告)号：US20110013733A1

公开(公告)日：2011-01-20

申请号：US12505413

申请日：2009-07-17

Applicant: Jon S. Martens ,  Helen Chau ,  David A. Rangel-Guzman ,  Peter M. Kapetanic ,  Dan Levasseur

Inventor： Jon S. Martens ,  Helen Chau ,  David A. Rangel-Guzman ,  Peter M. Kapetanic ,  Dan Levasseur

IPC: H04L27/08

CPC classification number: H03G3/3068

Abstract: A high speed receiver is provided using two parallel processing paths to enable rapid variable gain control. The parallel processing paths include a first processing path using a high resolution Discrete Fourier Transform (DFT), and a second processing path using a reduced DFT requiring fewer samples than the high resolution DFT. An initial sample of the data is processed using the second processing path with the reduced DFT by comparing a Fourier transform of the initial sample with predetermined threshold values. As a result of the comparison of the Fourier transform of the initial sample with the predetermined threshold values, a gain determination block determines whether a requirement exists for gain ranging. If gain ranging is needed, the gain of the data signal is adjusted and the gain ranging process repeats.

Abstract translation: 使用两个并行处理路径提供高速接收机，以实现快速可变增益控制。 并行处理路径包括使用高分辨率离散傅里叶变换（DFT）的第一处理路径，以及使用与高分辨率DFT相比需要较少样本的减少的DFT的第二处理路径。 通过将初始样本的傅立叶变换与预定阈值进行比较，使用具有减小的DFT的第二处理路径来处理数据的初始样本。 作为初始样本的傅里叶变换与预定阈值的比较的结果，增益确定块确定是否存在增益测距的要求。 如果需要增益测距，则调整数据信号的增益，并重复增益测距过程。

公开(公告)号：US5019790A

公开(公告)日：1991-05-28

申请号：US541586

申请日：1990-06-21

Applicant: Peter M. Kapetanic

Inventor： Peter M. Kapetanic

IPC: H03L7/20

CPC classification number: H03L7/20

Abstract: A method for eliminating subharmonic false locking in a sampler and frequency multiplier phase-locked-loop source locking system comprising the modification of a prior known algorithm for determining the frequency of the first local oscillator used for controlling the sampling of the output of a source voltage controlled oscillator. The frequency of the first local oscillator is determined using prior algorithms for determining the lowest usable harmonic number H and the highest usable first oscillator frequency which will maximize sampler efficiency and minimize local oscillator phase noise due to frequency multiplication. Thereater, the harmonic number H as thus determined is modified depending upon whether when divided by a multiplication factor M, where M is the factor by which the frequency of the VCO is multiplied, the remainder thereof is equal to 1/M, 2/M or zero. If the remainder of the division step is zero, then H is increased by one. If the remainder of the division step is equal to 2/M, then H is increased by two. If the remainder of the division step is equal to 1/M, then the magnitude of H as initially calculated is not adjusted. After H has been calculated and, if necessary, adjusted as described above, it is then used to calculate the first local oscillator frequency using the remaining steps in the prior known algorithm.

Abstract translation: 一种用于消除采样器和倍频器锁相环源锁定系统中的次谐波假锁定的方法，包括修改用于确定用于控制源电压输出的采样的第一本地振荡器的频率的现有已知算法 受控振荡器。 使用用于确定最低可用谐波数H和最高可用第一振荡器频率的先前算法来确定第一本地振荡器的频率，这将使采样器效率最大化并且由于倍频而使本地振荡器相位噪声最小化。 在那里，如此确定的谐波数H根据是否除以乘法因子M而被修改，其中M是乘法器的频率乘以的因子，其余数等于1 / M，2 / M 或零。 如果除法步骤的剩余部分为零，则H增加1。 如果除法步骤的剩余部分等于2 / M，则H增加2。 如果除法步骤的剩余部分等于1 / M，则不调整初始计算的H的幅度。 在H被计算之后，如果需要，如上所述进行调整，然后使用现有已知算法中的剩余步骤来计算第一本地振荡器频率。