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公开(公告)号：US20160004265A1
公开(公告)日：2016-01-07
申请号：US14321299
申请日：2014-07-01
Applicant: Innophase Inc.
Inventor： Nicolo Testi , Xi Li , Yang Xu
CPC classification number: G05F1/46
Abstract: A radio-frequency peak amplitude detection circuit includes a load capacitor, a current source that charges the load capacitor and set the bias current for the field effect transistors, and a pair of field effect transistors. The gates of the field effect transistors are biased at a level below the threshold voltage of the transistors. The transistors are arranged in parallel with the capacitor and are operable to drain the capacitor at a rate determined by a differential input at the gates of the transistors. The voltage across the load capacitor is low-pass filtered and has a voltage level representative of the amplitude of the differential input signal.
Abstract translation: 射频峰值振幅检测电路包括负载电容器，对负载电容器充电并为场效应晶体管设置偏置电流的电流源以及一对场效应晶体管。 场效应晶体管的栅极被偏置在低于晶体管的阈值电压的电平。 晶体管与电容器并联布置，并且可操作地以由晶体管的栅极处的差分输入确定的速率来排出电容器。 负载电容器两端的电压被低通滤波，并具有代表差分输入信号振幅的电压电平。
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公开(公告)号：US11070196B2
公开(公告)日：2021-07-20
申请号：US16736676
申请日：2020-01-07
Applicant: Innophase, Inc.
Inventor： Nicolo Testi
Abstract: An example process includes reducing a quality factor of a first tunable bandpass filter, used, for example, in a low-noise amplifier stage of a polar receiver. A first wideband test signal centered at a desired center frequency of a second tunable bandpass filter is received. A frequency response of the second tunable bandpass filter to the first wideband test signal is estimated using a Fast Fourier Transform (FFT) signal processor. At least a resonant frequency or a quality factor of the second tunable bandpass filter are calibrated based at least in part on a portion of the estimated frequency response of the second tunable bandpass filter obtained from the FFT signal processor. Frequency response characteristics of the first tunable bandpass filter may be similarly tuned in accordance with the example process.
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公开(公告)号：US11003142B2
公开(公告)日：2021-05-11
申请号：US16706321
申请日：2019-12-06
Applicant: Innophase, Inc.
Inventor： Nicolo Testi
Abstract: Systems and methods are described for determining a phase measurement difference between a received modulated signal and a local clock signal. An adjusted local clock phase measurement may be determined by subtracting, from the phase measurement difference, a phase correction that is based on the frequency difference between the modulator signal's carrier frequency and the local clock's frequency. A phase modulation value may be generated by scaling the adjusted local clock phase measurement. The scaling may be based on a ratio of the modulated signal's carrier frequency and the local clock's frequency. The phase correction may be based on (i) a count of periods of the modulated signal occurring between each corrected phase measurement and (ii) a difference between the carrier frequency and the local clock frequency.
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Patent Agency Ranking
公开(公告)号：US20200220526A1
公开(公告)日：2020-07-09
申请号：US16736676
申请日：2020-01-07
Applicant: Innophase, Inc.
Inventor： Nicolo Testi
Abstract: An example process includes reducing a quality factor of a first tunable bandpass filter, used, for example, in a low-noise amplifier stage of a polar receiver. A first wideband test signal centered at a desired center frequency of a second tunable bandpass filter is received. A frequency response of the second tunable bandpass filter to the first wideband test signal is estimated using a Fast Fourier Transform (FFT) signal processor. At least a resonant frequency or a quality factor of the second tunable bandpass filter are calibrated based at least in part on a portion of the estimated frequency response of the second tunable bandpass filter obtained from the FFT signal processor. Frequency response characteristics of the first tunable bandpass filter may be similarly tuned in accordance with the example process.
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公开(公告)号：US10108148B1
公开(公告)日：2018-10-23
申请号：US15488278
申请日：2017-04-14
Applicant: Innophase Inc.
Inventor： Nicolo Testi
Abstract: Systems and methods are provided for converting time measurements to digital value representing phase. Such systems and methods use a ring oscillator to create a coarse measurement of the time difference between first and second rising edges of a modulated signal. A two-dimensional Vernier structure is used to create a fine resolution measurement of the error in the coarse measurement. The coarse and fine measurements are combined to calculate a digital time measurement. A digital time output is calculated as the difference in successive digital time measurements. An offset digital time output is calculated as a difference in a digital time output in relation to a carrier period offset. The offset digital time output is scaled and accumulated to calculate the integrated time signal. The integrated time signals are synchronized to the carrier frequency to output a series of final phase measurements.
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公开(公告)号：US20180299835A1
公开(公告)日：2018-10-18
申请号：US15488278
申请日：2017-04-14
Applicant: Innophase Inc.
Inventor： Nicolo Testi
IPC: G04F10/00
Abstract: Systems and methods are provided for converting time measurements to digital value representing phase. Such systems and methods use a ring oscillator to create a coarse measurement of the time difference between first and second rising edges of a modulated signal. A two-dimensional Vernier structure is used to create a fine resolution measurement of the error in the coarse measurement. The coarse and fine measurements are combined to calculate a digital time measurement. A digital time output is calculated as the difference in successive digital time measurements. An offset digital time output is calculated as a difference in a digital time output in relation to a carrier period offset. The offset digital time output is scaled and accumulated to calculate the integrated time signal. The integrated time signals are synchronized to the carrier frequency to output a series of final phase measurements.
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公开(公告)号：US09229460B1
公开(公告)日：2016-01-05
申请号：US14321299
申请日：2014-07-01
Applicant: Innophase Inc.
Inventor： Nicolo Testi , Xi Li , Yang Xu
CPC classification number: G05F1/46
Abstract: A radio-frequency peak amplitude detection circuit includes a load capacitor, a current source that charges the load capacitor and set the bias current for the field effect transistors, and a pair of field effect transistors. The gates of the field effect transistors are biased at a level below the threshold voltage of the transistors. The transistors are arranged in parallel with the capacitor and are operable to drain the capacitor at a rate determined by a differential input at the gates of the transistors. The voltage across the load capacitor is low-pass filtered and has a voltage level representative of the amplitude of the differential input signal.
Abstract translation: 射频峰值振幅检测电路包括负载电容器，对负载电容器充电并为场效应晶体管设置偏置电流的电流源以及一对场效应晶体管。 场效应晶体管的栅极被偏置在低于晶体管的阈值电压的电平。 晶体管与电容器并联布置，并且可操作地以由晶体管的栅极处的差分输入确定的速率排出电容器。 负载电容器两端的电压被低通滤波，并具有代表差分输入信号振幅的电压电平。
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公开(公告)号：US08941441B2
公开(公告)日：2015-01-27
申请号：US13839462
申请日：2013-03-15
Applicant: Innophase, Inc.
Inventor： Nicolo Testi , Xi Li , Xuejun Zhang , Yang Xu
IPC: H03F3/45
CPC classification number: H03G3/008 , H03G1/0029 , H03G1/0088 , H03G5/14 , H03G5/24
Abstract: A low noise amplifier including a variable gain amplifier stage configured to accept an input signal and to provide a load driving signal; a tunable bandpass filter connected as a load to the variable gain amplifier stage, wherein the bandpass filter includes a cross-coupled transistor pair, and at least one cross-coupled compensation transistor pair biased in a subthreshold region configured to add a transconductance component when the load driving signal is of a magnitude large enough to decreases a transconductance of the cross-coupled transistor pair; and, a controller circuit configured to tune the bandpass filter. The filter can be tuned in respect to the frequency and the quality factor Q.
Abstract translation: 一种低噪声放大器，包括可变增益放大器级，其被配置为接受输入信号并提供负载驱动信号; 作为负载连接到可变增益放大器级的可调谐带通滤波器，其中所述带通滤波器包括交叉耦合晶体管对，以及偏置在亚阈值区域中的至少一个交叉耦合补偿晶体管对，其配置成当所述跨导分量 负载驱动信号的幅度足够大以减小交叉耦合晶体管对的跨导; 以及配置为调谐带通滤波器的控制器电路。 滤波器可以根据频率和质量因子Q进行调整。
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