公开(公告)号：US20230010569A1

公开(公告)日：2023-01-12

申请号：US17807750

申请日：2022-06-20

Applicant: ANRITSU CORPORATION

Inventor： Ittetsu KAJI ,  Takanori TANAKA ,  Kayoko HORIUCHI

IPC: H04B1/04

Abstract: The signal generating device includes a signal generator that generates a signal of a predetermined frequency, a high-pass filter bank that removes a signal of a frequency lower than or equal to a first frequency lower than a predetermined frequency from the signal generated by the signal generator, a YTF that removes a signal outside a predetermined frequency band from the signal output by the high-pass filter bank, a splitter that distributes the signal output by the YTF into a plurality of signals, two amplifiers that adjust levels of the signals distributed by the splitter, respectively, and two low-pass filter banks that remove signals of frequencies equal to or higher than a second frequency which is higher than the predetermined frequency from each of the signals output by the amplifiers.

公开(公告)号：US20230006687A1

公开(公告)日：2023-01-05

申请号：US17808165

申请日：2022-06-22

Applicant: ANRITSU CORPORATION

Inventor： Ittetsu KAJI ,  Kayoko HORIUCHI

IPC: H03M3/00

Abstract: There are provided a signal generation unit that generates a predetermined digital signal, a level conversion unit that converts a level of the digital signal generated by the signal generation unit, a DA converter that converts the digital signal of which the level is converted by the level conversion unit into an analog signal in a predetermined intermediate frequency bandwidth, and a control unit that creates correction data for correcting a linearity of a level of an output signal of the DA converter for all frequencies to be used, based on actual data which is data of a level of an actual output signal when a setting of the level of the output signal of the DA converter is changed at a predetermined level interval, at a predetermined frequency, and converts a level of an input signal of the DA converter with the correction data.

公开(公告)号：US20180269924A1

公开(公告)日：2018-09-20

申请号：US15921112

申请日：2018-03-14

Applicant: ANRITSU CORPORATION

Inventor： Ittetsu KAJI ,  Kazuhiro YAMANE

IPC: H04B1/7087

CPC classification number: H04B1/7087 ,  H03C3/00 ,  H03L7/18 ,  H04B15/04 ,  H04B2201/70728 ,  H04B2201/7073 ,  H04L7/0331

Abstract: Provided is a technique that can generate a spread spectrum clock signal in all of an upper-spread mode, a down-spread mode, and a center-spread mode. A spread spectrum clock generator (2) spreads a spectrum of a signal with a predetermined carrier frequency to generate a spread spectrum clock signal under the control of a control unit (13). The control unit includes carrier frequency correction control means (13b). The carrier frequency correction control means shifts the predetermined carrier frequency to generate, from one spread mode, a spread spectrum clock signal of another pseudo spread mode.