Switching DC converting device and portable system for ultrasonic medical imaging and diagnosing and method thereof
First Claim
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1. A switching DC converting device comprising:
- a switching DC converter; and
a synchronous clock circuit configured to provide a wobbling synchronous clock input for the switching DC converter, wherein a central frequency of the wobbling synchronous clock provided by the synchronous clock circuit is synchronous to a phase of and different than an operating frequency of a circuit powered by the switching DC converting device.
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Abstract
A switching DC converting device includes a switching DC converter and a synchronous clock circuit. The synchronous clock circuit is used to provide a wobbling synchronous clock input for the switching DC converter, and the central frequency of the wobbling synchronous clock avoids the operating frequency of a circuit powered by the switching DC converter.
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Citations
18 Claims
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1. A switching DC converting device comprising:
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a switching DC converter; and a synchronous clock circuit configured to provide a wobbling synchronous clock input for the switching DC converter, wherein a central frequency of the wobbling synchronous clock provided by the synchronous clock circuit is synchronous to a phase of and different than an operating frequency of a circuit powered by the switching DC converting device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A portable system for ultrasonic medical imaging and diagnosing, said portable system comprising:
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a system controller; a system receiving circuit; a switching DC converter; and a synchronous clock circuit configured to provide a wobbling synchronous clock input for the switching DC converter, wherein a central frequency of the wobbling synchronous clock is synchronous to a phase of and different than an operating frequency of the system receiving circuit powered by the switching DC converter. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for reducing influence of radiation interference noise of a switching DC converter on an ultrasonic receiving circuit in a portable system for ultrasonic medical imaging and diagnosing, said method comprising:
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inputting a wobbling synchronous clock to the switching DC converter; and operating the wobbling synchronous clock at a central frequency that is synchronous to a phase of and different than an operating frequency of the ultrasonic receiving circuit in the portable system for ultrasonic medical imaging and diagnosing. - View Dependent Claims (17, 18)
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Specification