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Dual Edge Look-ahead Enhanced Comparator and Its Active Full-Bridge Rectifier

A technology of advanced correction and comparator, which is applied in the direction of converting AC power input to DC power output, multiple input and output pulse circuits, and output power conversion devices, etc., which can solve rectifier efficiency reduction, instability, and large rectifier drive loss etc. to achieve the effects of reducing extra power, improving efficiency, and reducing DC bias current

Active Publication Date: 2017-02-15
XI AN JIAOTONG UNIV
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Problems solved by technology

However, since this double-edge correction comparator has two different comparison discrimination levels, it is inherently unstable, and if the comparator oscillates, it will cause greater rectifier drive loss, and the efficiency of the rectifier reduce

Method used

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  • Dual Edge Look-ahead Enhanced Comparator and Its Active Full-Bridge Rectifier
  • Dual Edge Look-ahead Enhanced Comparator and Its Active Full-Bridge Rectifier
  • Dual Edge Look-ahead Enhanced Comparator and Its Active Full-Bridge Rectifier

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Embodiment Construction

[0035] The most critical performance parameter in a wireless power system is efficiency. As a part of the wireless power supply system, the efficiency of the rectifier is naturally also the focus of attention.

[0036] Low power consumption and high-speed comparators are beneficial to the improvement of the efficiency of active rectifiers. Therefore, the key point of current research is to increase the comparison speed of comparators while reducing power consumption. The traditional hysteresis comparator can provide a faster comparison speed, but when the frequency of the rectifier is greater than 1MHz, if the hysteresis comparator wants to obtain a speed of nanosecond or even picosecond, it needs a very large DC bias current, which is not conducive to Improvement of the overall efficiency of the active rectifier. In order to reduce the efficiency drop caused by the reverse leakage current caused by the low speed of the comparator, the method of off-edge correction can be int...

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Abstract

The invention discloses a double-edge lead correction strengthening comparator and an active full-bridge rectifier of the double-edge lead correction strengthening comparator. A pre-amplifier of the double-edge lead correction strengthening comparator comprises a bias current circuit and a common gate amplifying circuit; the bias current circuit is used for providing current polarization for the common gate amplifying circuit; the common gate amplifying circuit is used for amplifying an input voltage and generating quasi digital output; an imbalance generation circuit is used for generating different imbalance voltages in an imbalance current mode, and lead comparison is carried out on a rising edge and a falling edge of the comparator; a double-edge digital latch is used for latching output results of the comparator; a driving stage is used for amplifying output signals of the double-edge digital latch; a feedback control circuit is used for reducing a direct current bias current to improve the efficiency of the rectifier. By means of the double-edge lead correction strengthening comparator and the active full-bridge rectifier, the stability of the double-edge correction comparator is achieved through the double-edge digital latch and feedback control method, quiescent dissipation of the double-edge correction comparator is optimized, and the aim of improving the efficiency of the active rectifier is achieved.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of biomedical electronics and low-power integrated circuit design, in particular to a comparator and an active full-bridge rectifier thereof. [0003] 【Background technique】 [0004] With the rapid development of medical technology, there are more and more types of implantable medical devices for the purpose of treatment and diagnosis. The shortcomings of battery power supply have led to the emergence of wireless power supply systems for percutaneous transmission, which can gradually replace batteries and provide long-term, stable, and efficient energy for complex implantable systems. With the continuous development of implantable systems and the complexity of functions, the wireless power supply system is also required to be small in size, low in voltage and high in efficiency. [0005] Currently applied wireless power supply systems work at lower operating frequencies and higher operating voltages, and thei...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/22H02M7/219
Inventor 耿莉薛仲明范世全苟伟谢毅宋焱唐炳俊
Owner XI AN JIAOTONG UNIV
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