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1. 发明申请

US20230140378A1 TRAVELING WAVE MIXER 有权
公开(公告)号：US20230140378A1
公开(公告)日：2023-05-04
申请号：US17878244
申请日：2022-08-01
申请人： Keysight Technologies, Inc.
发明人： Rizwan Pasha
IPC分类号： H03D7/12 , H03F3/58
摘要： A travelling wave mixer (TWM) is provided that includes an input artificial transmission line configured to transmit an input signal, an output artificial transmission line configured to transmit an output signal, a local oscillator (LO) artificial transmission line configured to transmit an LO signal, and a plurality of mixer stages connected in parallel between the output artificial transmission and the input artificial transmission line. Each of the mixer stages includes an input amplifier, a mixer and an output amplifier connected in series between the input artificial transmission line and the output artificial transmission line, where an input of the mixer receives an output of the input amplifier, and an output of the mixer is applied to an input of the output amplifier. Further, each of the mixer stages includes a phase-adjustable LO amplifier circuit connected between the LO artificial transmission line and an LO input of the mixer, where the phase-adjustable LO amplifier is configured to adjust an LO signal phase applied to the LO input of each mixer to null out a phase error in each mixer stage independently.

2. 发明授权

US11616527B2 Transmitter/receiver and signal generation method 有权
公开(公告)号：US11616527B2
公开(公告)日：2023-03-28
申请号：US17295343
申请日：2019-11-18
申请人： HIROSHIMA UNIVERSITY
发明人： Kyoya Takano , Minoru Fujishima
IPC分类号： H04B1/38 , H04B1/54 , H03D7/14 , H03D7/16
摘要： A transmitter/receiver (1) up-converts, using an LO signal as a local oscillation signal, an IF signal having a predetermined frequency band, thereby generating a transmission signal RFTX. Moreover, the transmitter/receiver (1) generates a (LO+IF)2 signal and a (LO−IF)2 signal based on the IF signal and the LO signal. Using the LO signal obtained by adding-up of the (LO+IF)2 signal and the (LO−IF)2 signal, a reception signal RFRX is down-converted. Thus, a local oscillation signal generation unit of a receiving unit is not necessary.

3. 发明申请

US20230056358A1 COMMUNICATION DEVICE FOR PERFORMING DIFFERENTIAL PHASE SHIFT KEYING BASED ON A PLURALITY OF PREVIOUS SIGNALS AND OPERATING METHOD THEREOF 有权
公开(公告)号：US20230056358A1
公开(公告)日：2023-02-23
申请号：US17819984
申请日：2022-08-16
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： Jonghyun Baik
IPC分类号： H04L27/18 , H04L27/32 , H03D13/00
摘要： An method of determining a symbol according to a phase difference between input signals input in order of time may include calculating a first phase difference between a phase of a first previous signal received prior to a target signal and a phase of a second previous signal received prior to the first previous signal; calculating a second phase difference between a phase of the target signal and the phase of the second previous signal; calculating target likelihoods based on the first phase difference and the second phase difference; and determining an expected phase difference between the target signal and the first previous signal or an expected symbol for the target signal, based on the target likelihoods.

4. 发明授权

US11588614B1 Frequency search and error correction method in clock and data recovery circuit 有权
公开(公告)号：US11588614B1
公开(公告)日：2023-02-21
申请号：US17932473
申请日：2022-09-15
申请人： EverPro Technologies Company Limited
发明人： Jinfeng Tian , Yan Li
IPC分类号： H03D3/24 , H04L7/00 , H04L7/04 , H03L7/08
摘要： A method of frequency search and error correction of clock and data recovery circuit, comprising: initializing a frequency search algorithm parameter; processing a frequency error parameter UP/DN signals according to the set algorithm parameter and starting the frequency search, in which, the algorithm accordingly counts the UP/DN signals. When a phase error signal transition occurs, a transition parameter JUMP is accumulated by 1, and an accumulation parameter SUM is obtained and is further judged that whether a frequency search result is to be output. Number of repeating times of verification and threshold parameters are set, accordingly a reset DCRL value is obtained to verifies a frequency locking result and outputs the result. The present invention improves accuracy of UP/DN pulse counting, increases stability and reliability of the frequency locking, avoids a false locking in the frequency locking, and prevents an excessive locking time in the frequency locking, overcomes error judgment of the frequency search caused by a random jitter, and correctly completes the frequency search and locking, avoids failure of the CDR caused by an error frequency locking.

5. 发明授权

US11581852B2 Systems and methods for detecting local oscillator leakage and image tone in I/Q mixer based transceivers 有权
公开(公告)号：US11581852B2
公开(公告)日：2023-02-14
申请号：US17511434
申请日：2021-10-26
申请人： Samsung Electronics Co., Ltd.
发明人： Hariharan Nagarajan , Ashutosh Verma , Chung Lau , Tienyu Chang
IPC分类号： H03D1/04 , H03D1/06 , H03D1/18 , H03D7/14 , H04B1/403 , H04B17/10
摘要： According to one embodiment, a transceiver includes: a radio transmitter including a power amplifier; a detector circuit including: a squaring circuit configured to receive an output of the power amplifier of the radio transmitter and configured to produce an output current; and a DC current absorber electrically connected to an output terminal of the squaring circuit.

6. 发明授权

US11552663B2 Split mixer current conveyer 有权
公开(公告)号：US11552663B2
公开(公告)日：2023-01-10
申请号：US17116672
申请日：2020-12-09
申请人： Huawei Technologies Co., Ltd.
发明人： Matthew Richard Miller , Brian Creed , Terrie McCain
IPC分类号： H04B1/16 , H03D7/12 , H03F3/45
摘要： The disclosure relates to technology for an apparatus having a current conveyer comprising a first stage having a first differential input, and a second stage having a second differential input. The first and second stages are configured to operate in a push-pull mode to provide an output signal at a current conveyer output between the first stage and the second stage. The apparatus has a first frequency mixer configured to generate a first mixer signal based on an input signal and an oscillator signal having a first frequency. The first frequency mixer is configured to provide the first mixer signal to the first differential input. The apparatus has a second frequency mixer configured to generate a second mixer signal based on the input signal and a second oscillator signal having the first frequency. The second frequency mixer is configured to provide the second mixer signal to the second differential input.

7. 发明授权

US11496177B2 Agile navigation transmitter system that includes a single amplifier system 有权
公开(公告)号：US11496177B2
公开(公告)日：2022-11-08
申请号：US16917445
申请日：2020-06-30
申请人： KBR Wyle Services, LLC
发明人： Gregory William Gerten , Gary Louis Green , Rachel Eunice Reed , Jared T. Emerson , Sean Joseph Stasiak , Steven John Billman
IPC分类号： H04B1/403 , H04B1/18 , H04B1/00 , H04B1/28 , G06F16/901 , H04B1/16 , H04B1/04 , H04B17/318 , G01S19/07 , G01S19/34 , G01S19/37 , H03D7/16 , G01S19/24 , G01S19/31
摘要： A method and transmission system for amplifying and providing navigation signals. The system comprises a splitter circuit configured to receive a plurality of radio frequency (RF) signals oscillating at at least two different frequencies f1 and f2. The splitter circuit is further configured to split and forward the RF signals having the f1 frequency to a first bandpass filter and the RF signals having the f2 frequency to a second bandpass filter. The system further comprises a first tunable amplifier configured to receive the RF signals from the first bandpass filter. The system further comprises a second tunable amplifier configured to receive the RF signals from the second bandpass filter at substantially the same time as the first tunable amplifier's receipt of the RF signals from the first bandpass filter. The first tunable amplifier is further configured to amplify its RF signals across a first band centered around the frequency f1. The second tunable amplifier is further configured to amplify its RF signals across a second band centered around the frequency f2. The amplified RF signals are fed substantially concurrently into a mixer circuit for transmission via an RF antenna to a navigation receiver.

8. 发明授权

US11489656B2 Wireless station and method of correcting frequency error 有权
公开(公告)号：US11489656B2
公开(公告)日：2022-11-01
申请号：US17191879
申请日：2021-03-04
申请人： ICOM INCORPORATED
发明人： Takeo Tomita , Masaki Akasaka , Yasuo Ueno
IPC分类号： H03D3/22 , H04L27/22 , H04L7/00
摘要： A wireless station includes at least one oscillator to output a reference signal, and an error calculator to calculate a frequency of the reference signal and calculate a frequency error by subtracting a target frequency of the reference signal from the calculated frequency of the reference signal. The wireless station further includes a modulation data generator to generate modulation data by adding a correction value, varying in negative correlation with the frequency error calculated by the error calculator, to data to be transmitted, and a modulator to conduct frequency modulation on the basis of the modulation data and the reference signal.

9. 发明授权

US11464418B2 Systems for health monitoring using radio waves that include collocated RF components 有权
公开(公告)号：US11464418B2
公开(公告)日：2022-10-11
申请号：US16682800
申请日：2019-11-13
申请人： MOVANO INC.
发明人： Michael A. Leabman
IPC分类号： A61B5/0245 , H04B7/08 , H04B7/06 , A61B5/00 , A61B5/145 , A61B5/021 , A61B5/05 , G01S7/03 , G01S13/02 , G01S13/26 , A61B5/024 , G01S13/88 , A61B5/0205 , G01S13/76 , H03D7/16 , H04B1/04 , G01S7/02
摘要： A device for monitoring a health parameter of a person is disclosed. The device includes a semiconductor substrate including at least one transmit component and multiple receive components, at least one transmit antenna configured to transmit millimeter range radio waves over a 3D space below the skin surface of a person, and multiple receive antennas configured to receive radio waves, the received radio waves including a reflected portion of the transmitted radio waves, wherein the semiconductor substrate includes circuits for processing signals received on the multiple receive antennas, wherein the semiconductor substrate includes at least one output configured to output a signal that corresponds to a health parameter of a person in response to received radio waves, and wherein the at least one transmit antenna is collocated with the at least one transmit component and the multiple receive antennas are collocated with respective ones of the multiple receive components.

10. 发明授权

US11463047B2 Mixer 有权
公开(公告)号：US11463047B2
公开(公告)日：2022-10-04
申请号：US17466669
申请日：2021-09-03
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Shinya Yokomizo , Takanobu Fujiwara , Masaomi Tsuru , Mitsuhiro Shimozawa , Akihito Hirai
IPC分类号： H03D7/14 , H04B1/30
摘要： A mixer includes a first unit mixer, a second unit mixer, a third unit mixer, and a fourth unit mixer that have the same configuration and a first combiner, a second combiner, and a third combiner that have the same configuration. The first to the fourth unit mixers each include a differential RF signal terminal. Output of the first unit mixer and output of the second unit mixer are combined by the second combiner. Output of the third unit mixer and output of the fourth unit mixer are combined by the third combiner. Output of the second combiner and output of the third combiner are combined by the first combiner. The output of the third unit mixer is input to the third combiner with the polarity being determined.

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