Switched current source circuit and method for fast establishment of switched current source
A switching current source and current source technology, applied in the direction of high-efficiency power electronic conversion, conversion of DC power input to DC power output, electrical components, etc., can solve problems such as poor performance of switching current sources, reduce circuit area, and reduce costs. , reducing the effect of decoupling capacitors
Active Publication Date: 2022-07-12
MONTAGE TECH KUNSHAN CO LTD
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Problems solved by technology
[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a switching current source circuit and a method for quickly establishing a switching current source, which are used to solve the problem of poor performance of the switching current source in the prior art when the bias current is reduced
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[0045] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
[0046] It should be noted that the drawings provided in this embodiment are only to illustrate the basic concept of the present invention in a schematic way, so the drawings only show the components related to the present invention rather than the number, shape and the number of components in actual implementation. For dimension drawing, the type, quantity and proportion of each component can be changed at will in actual implementation, and t...
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The present invention provides a switched current source circuit and a method for rapidly establishing a switched current source, comprising first and second switched current source branches connected in parallel to one end of a load; when a switch enable signal is switched, the first and second switched current sources The branch circuit causes the bias voltage to produce jitters in the same and opposite directions as the switch enable signal jumping direction due to charge coupling respectively; the two jitters cancel each other out so that the current source bias voltage recovers quickly when the switch is switched. Or include a switch current source branch connected in series with one end of the load; when the switch enable signal is switched, the first and second bias nodes in the switch current source branch respectively have the same and opposite direction as the switch enable signal. ; The two jitters cancel each other out, and the current source bias voltage recovers quickly when the switch is switched. The present invention accelerates the establishment of the current through the coupling of the charges, and can reduce the decoupling capacitance at the same time, so as to further reduce the circuit area and reduce the cost.
Description
technical field [0001] The invention relates to the field of analog integrated circuits, in particular to a switch current source circuit and a method for rapidly establishing a switch current source. Background technique [0002] With the continuous development of the integration and performance of integrated circuits, today's integrated circuits have reached the order of 100 watts, which requires expensive packaging, heat sinks and cooling environments. According to Moore's Law, the density of transistors doubles every 18 months, and it takes 5 years for power technology to achieve the same growth rate. Obviously, power technology has become a bottleneck. The large current in the circuit will reduce the life and reliability of the product, and it will also cause failure when the dynamic voltage drop of the power supply is serious. Therefore, the power consumption of the integrated circuit needs to be reduced, and usually we save power consumption by reducing the bias curr...
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IPC IPC(8): H02M3/156
CPCH02M3/1563G05F3/02H03K17/302
Inventor 印健江立新俞惠
Owner MONTAGE TECH KUNSHAN CO LTD