Signal reception of magnetic resonance imaging device
First Claim
1. A receiver comprising:
- a group delay circuit configured to perform a group delay on an original analog signal for a delay time to obtain a group delayed analog signal;
a controller configured to determine a gain mode according to an amplitude of the original analog signal;
a gain circuit coupled to the group delay circuit and the controller and configured to adjust, according to the determined gain mode, a power of the group delayed analog signal to obtain an adjusted analog signal, wherein the delay time is greater than a sum of a first time for the controller determining the gain mode and a second time for the gain circuit to switch a current gain mode to the determined gain mode;
an analog-to-digital (ADC) converter coupled to the gain circuit and configured to perform an analog-to-digital conversion on the adjusted analog signal to generate a digital signal; and
an amplitude-phase-processing circuit coupled to the analog-to-digital converter and configured to adjust amplitude and phase of the digital signal according to the determined gain mode.
1 Assignment
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Accused Products
Abstract
Methods, devices, and apparatus for signal reception are provided. In one aspect, a receiver includes: a group delay circuit configured to perform a group delay on an original analog signal to obtain a group delayed analog signal, a controller configured to determine a gain mode according to an amplitude of the original analog signal, a gain circuit coupled to the group delay circuit and the controller and configured to adjust a power of the group delayed analog signal according to the determined gain mode to obtain an adjusted analog signal, an analog-to-digital converter coupled to the gain circuit and configured to perform an analog-to-digital conversion on the adjusted analog signal to generate a digital signal, and an amplitude-phase-processing circuit configured to adjust amplitude and phase of the digital signal according to the determined gain mode.
3 Citations
19 Claims
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1. A receiver comprising:
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a group delay circuit configured to perform a group delay on an original analog signal for a delay time to obtain a group delayed analog signal; a controller configured to determine a gain mode according to an amplitude of the original analog signal; a gain circuit coupled to the group delay circuit and the controller and configured to adjust, according to the determined gain mode, a power of the group delayed analog signal to obtain an adjusted analog signal, wherein the delay time is greater than a sum of a first time for the controller determining the gain mode and a second time for the gain circuit to switch a current gain mode to the determined gain mode; an analog-to-digital (ADC) converter coupled to the gain circuit and configured to perform an analog-to-digital conversion on the adjusted analog signal to generate a digital signal; and an amplitude-phase-processing circuit coupled to the analog-to-digital converter and configured to adjust amplitude and phase of the digital signal according to the determined gain mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of receiving a signal, comprising:
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performing a group delay on an original analog signal to obtain a group delayed analog signal; determining a gain mode according to an amplitude of the original analog signal; adjusting, according to the determined gain mode, a power of the group delayed analog signal to obtain an adjusted analog signal; performing an analog-to-digital conversion on the adjusted analog signal to generate a digital signal; and adjusting amplitude and phase of the digital signal according to the determined gain mode, wherein performing the group delay on the analog signal comprises; determining that a delay time is greater than a sum of a first time for determining the gain mode and a second time for switching a current gain mode to the determined gain mode; and performing the group delay on the analog signal for the delay time. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A receiver comprising:
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a group delay circuit configured to perform a group delay on an original analog signal to obtain a group delayed analog signal; a controller configured to determine a gain mode according to an amplitude of the original analog signal, wherein the gain mode comprises one of a high gain mode and a low gain mode, wherein an amplifying factor of the low gain mode is smaller than an amplifying factor of the high gain mode, and an attenuating factor of the low gain mode is higher than an attenuating factor of the high gain mode; a gain circuit coupled to the group delay circuit and the controller and configured to adjust, according to the determined gain mode, a power of the group delayed analog signal to obtain an adjusted analog signal; an analog-to-digital (ADC) converter coupled to the gain circuit and configured to perform an analog-to-digital conversion on the adjusted analog signal to generate a digital signal; and an amplitude-phase-processing circuit coupled to the analog-to-digital converter and configured to adjust amplitude and phase of the digital signal according to the determined gain mode.
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Specification