JPWO2019185633A5 - - Google Patents

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JPWO2019185633A5
JPWO2019185633A5 JP2020551574A JP2020551574A JPWO2019185633A5 JP WO2019185633 A5 JPWO2019185633 A5 JP WO2019185633A5 JP 2020551574 A JP2020551574 A JP 2020551574A JP 2020551574 A JP2020551574 A JP 2020551574A JP WO2019185633 A5 JPWO2019185633 A5 JP WO2019185633A5
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delta modulator
signal processing
asynchronous sigma
asynchronous
processing system
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JP7309746B2 (en
JP2021519532A (en
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Priority claimed from EP18164263.8A external-priority patent/EP3547544A1/en
Priority claimed from EP18164277.8A external-priority patent/EP3547545A1/en
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Priority claimed from PCT/EP2019/057600 external-priority patent/WO2019185633A1/en
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Claims (15)

アナログ信号をプローブから遠隔処理ユニットへ伝送する信号処理システムであって、
被検体から取得されるアナログプローブ信号を受信する前記プローブにおける第１ＡＳＩＣであって、前記アナログプローブ信号を受信し、非同期時間ドメインパルスを含む二進ビットストリームを出力する非同期シグマデルタ変調器を有する第１ＡＳＩＣと、
前記二進ビットストリームを受信する前記遠隔処理ユニットにおける第２ＡＳＩＣと、
を有し、
前記非同期シグマデルタ変調器は、該非同期シグマデルタ変調器の時間利得関数を時間にわたって変化させる時間利得関数回路を有し、
前記時間利得関数が、前記非同期シグマデルタ変調器のフィードバック利得を制御し、これにより該非同期シグマデルタ変調器のダイナミックレンジを制御し、
前記時間利得関数回路は更に、前記非同期シグマデルタ変調器の時間利得関数を前記プローブの撮像深度に関連するユーザ入力に基づいて変化させる、
信号処理システム。 A signal processing system that transmits analog signals from a probe to a remote processing unit.
A first ASIC in the probe that receives an analog probe signal obtained from a subject and has an asynchronous sigma-delta modulator that receives the analog probe signal and outputs a binary bitstream containing an asynchronous time domain pulse . 1ASIC and
The second ASIC in the remote processing unit that receives the binary bit stream, and
Have,
The asynchronous sigma delta modulator has a time gain function circuit that changes the time gain function of the asynchronous sigma delta modulator over time.
The time gain function controls the feedback gain of the asynchronous sigma delta modulator, thereby controlling the dynamic range of the asynchronous sigma delta modulator.
The time gain function circuit further changes the time gain function of the asynchronous sigma delta modulator based on user input related to the imaging depth of the probe.
Signal processing system. 前記二進ビットストリームを前記第１ＡＳＩＣから前記第２ＡＳＩＣに伝搬させるデータチャンネルを更に有する、請求項１に記載の信号処理システム。 The signal processing system according to claim 1, further comprising a data channel for propagating the binary bitstream from the first ASIC to the second ASIC. 前記第１ＡＳＩＣは１.８Ｖ以上、例えば２.５Ｖの電圧で動作し、前記第２ＡＳＩＣが１.８Ｖ以下、例えば１.１Ｖの電圧で動作する、請求項１又は請求項２に記載の信号処理システム。 The signal processing according to claim 1 or 2, wherein the first ASIC operates at a voltage of 1.8 V or higher, for example 2.5 V, and the second ASIC operates at a voltage of 1.8 V or lower, for example 1.1 V. system. 前記非同期シグマデルタ変調器が低雑音増幅器を有する、請求項１から３の何れか一項に記載の信号処理システム。 The signal processing system according to any one of claims 1 to 3, wherein the asynchronous sigma delta modulator has a low noise amplifier. 前記非同期シグマデルタ変調器が、
前記低雑音増幅器の出力端、及び
前記低雑音増幅器の入力端、
に接続されたフィードバックコンデンサを更に有する、請求項４に記載の信号処理システム。 The asynchronous sigma delta modulator
The output end of the low noise amplifier and the input end of the low noise amplifier,
The signal processing system of claim 4, further comprising a feedback capacitor connected to. 前記非同期シグマデルタ変調器がローパスフィルタを更に有する、請求項１から５の何れか一項に記載の信号処理システム。 The signal processing system according to any one of claims 1 to 5, wherein the asynchronous sigma-delta modulator further comprises a low-pass filter. 前記非同期シグマデルタ変調器が非同期二進量子化器を更に有する、請求項１から６の何れか一項に記載の信号処理システム。 The signal processing system according to any one of claims 1 to 6, wherein the asynchronous sigma-delta modulator further comprises an asynchronous binary quantizer. 前記非同期シグマデルタ変調器がフィードバックデジタル／アナログ変換器を有する、請求項１から７の何れか一項に記載の信号処理システム。 The signal processing system according to any one of claims 1 to 7, wherein the asynchronous sigma-delta modulator has a feedback digital / analog converter. 前記第１ＡＳＩＣは音響トランスジューサ素子を更に有し、該音響トランスジューサ素子が到来する音響信号を受信し、音響信号を出力する、請求項１から８の何れか一項に記載の信号処理システム。 The signal processing system according to any one of claims 1 to 8, wherein the first ASIC further includes an acoustic transducer element, receives an acoustic signal arriving by the acoustic transducer element, and outputs an acoustic signal. 前記第２ＡＳＩＣが復調器を有する、請求項１から９の何れか一項に記載の信号処理システム。 The signal processing system according to any one of claims 1 to 9, wherein the second ASIC has a demodulator. 前記復調器は非同期時間ドメインパルスを含む前記二進ビットストリームを受信し、再構成されたアナログ信号を出力し、前記第２ＡＳＩＣが前記再構成されたアナログ信号を受信するアナログ／デジタル変換器を更に有する、請求項１０に記載の信号処理システム。 The demodulator further receives the binary bit stream containing the asynchronous time domain pulse, outputs the reconstructed analog signal, and the second ASIC further receives the reconstructed analog signal. The signal processing system according to claim 10. 前記プローブは超音波プローブであり、前記遠隔処理ユニットがバックエンド信号処理ユニットである、請求項１から１１の何れか一項に記載の信号処理システム。 The signal processing system according to any one of claims 1 to 11, wherein the probe is an ultrasonic probe and the remote processing unit is a back-end signal processing unit. アナログ信号をプローブから遠隔処理ユニットに伝送する方法であって、
被検体からのアナログ信号を、前記プローブにおける第１ＡＳＩＣにおいて受信するステップと、
前記アナログ信号に対して非同期シグマデルタ変調器により非同期シグマデルタ変調を実行し、これにより非同期時間ドメインパルスを含む二進ビットストリームを発生するステップと、
前記二進ビットストリームを前記遠隔処理ユニットにおける第２ＡＳＩＣにおいてデータチャンネルから受信するステップと、
を有し、
前記アナログ信号に対して非同期シグマデルタ変調を実行するステップは、前記非同期シグマデルタ変調器の時間利得関数を時間にわたって、又はユーザ入力に基づいて変化させるステップを有し、
前記時間利得関数が、前記非同期シグマデルタ変調器のフィードバック利得を制御し、これにより該非同期シグマデルタ変調器のダイナミックレンジを制御し、
時間利得関数回路が更に、前記非同期シグマデルタ変調器の時間利得関数を前記プローブの撮像深度に関連するユーザ入力に基づいて変化させる、
方法。 A method of transmitting an analog signal from a probe to a remote processing unit.
The step of receiving the analog signal from the subject at the first ASIC in the probe, and
A step of performing asynchronous sigma-delta modulation on the analog signal with an asynchronous sigma-delta modulator, thereby generating a binary bitstream containing an asynchronous time domain pulse .
The step of receiving the binary bitstream from the data channel in the second ASIC in the remote processing unit, and
Have,
The step of performing asynchronous sigma-delta modulation on the analog signal comprises changing the time gain function of the asynchronous sigma-delta modulator over time or based on user input .
The time gain function controls the feedback gain of the asynchronous sigma delta modulator, thereby controlling the dynamic range of the asynchronous sigma delta modulator.
The time gain function circuit further changes the time gain function of the asynchronous sigma-delta modulator based on the user input associated with the imaging depth of the probe.
Method. 前記アナログ信号が超音波信号を有する、請求項１３に記載の方法。 13. The method of claim 13, wherein the analog signal has an ultrasonic signal. コンピュータ上で実行された場合に請求項１３又は１４に記載の方法を実施するコンピュータプログラムコード手段を有する、コンピュータプログラム。 A computer program having computer program code means that implements the method of claim 13 or 14, when executed on a computer.
JP2020551574A 2018-03-27 2019-03-26 Systems and methods for performing analog-to-digital conversion between multiple spatially separated stages Active JP7309746B2 (en)

Applications Claiming Priority (5)

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EP18164263.8A EP3547544A1 (en) 2018-03-27 2018-03-27 Systems and methods for performing analog-to-digital conversion across multiple, spatially separated stages
EP18164263.8 2018-03-27
EP18164277.8 2018-03-27
EP18164277.8A EP3547545A1 (en) 2018-03-27 2018-03-27 Systems and methods for performing analog-to-digital conversion across multiple, spatially separated stages
PCT/EP2019/057600 WO2019185633A1 (en) 2018-03-27 2019-03-26 Systems and methods for performing analog-to-digital conversion across multiple, spatially separated stages

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