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A Charge Pump with Dynamic Current Compensation

A dynamic current and compensation circuit technology, applied in the field of charge pump, can solve the problem that the output voltage range of the charge pump is not greatly improved, and achieve the effect of good current matching and reducing current

Active Publication Date: 2020-01-03
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention obtains a better current matching effect at a lower cost, but the output voltage range of the charge pump of this structure has not been greatly improved

Method used

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  • A Charge Pump with Dynamic Current Compensation
  • A Charge Pump with Dynamic Current Compensation
  • A Charge Pump with Dynamic Current Compensation

Examples

Experimental program
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specific Embodiment

[0026] Such as Figure 5 As shown, a dynamic current compensation charge pump includes a current input stage circuit 1, a current source bias circuit 2, a current injection circuit 3, a dynamic current compensation circuit 4 connected in parallel with the current injection circuit 3, and an output current source bias circuit 5 and current output stage circuit 6; current source bias circuit 2, current injection circuit 3, and output current source bias circuit 5 are all composed of n-type current source and p-type current source; current input stage circuit 1 is composed of n-type current source Composition; Current output stage circuit 6 is made up of n-type current source 7, p-type current source 8, the first n-type field effect tube switch 9, the second n-type field effect tube switch 10, the first p-type field effect tube switch 11, The second p-type field effect transistor switch 12 and the unit gain operational amplifier 13 are formed. The n-type current source is compos...

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Abstract

The invention discloses a dynamic current compensation charge pump, which comprises a current input stage circuit (1), a current source bias circuit (2), a current injection circuit (3), and a dynamic current compensation circuit connected in parallel with the current injection circuit (3). circuit (4), output current source bias circuit (5) and current output stage circuit (6). The output current-voltage curve is dynamically adjusted through the dynamic current compensation circuit (4) connected in parallel with the current injection circuit (3), so that the charge pump can maintain better current matching accuracy in a larger output voltage range. On the basis of the traditional structure, the present invention introduces a dynamic compensation circuit (4) connected in parallel with the current injection circuit (3), and achieves better current matching within a relatively large output voltage range at a very small cost.

Description

technical field [0001] The invention relates to the technical field of charge pumps, in particular to a charge pump with dynamic current compensation. Background technique [0002] Frequency synthesizers based on PLL technology are widely used in communication systems because of their low power consumption and good performance. The performance of the frequency synthesizer directly determines the signal quality of the communication system. For example, the spur of the frequency synthesizer will convert the out-of-band interference signal into the channel, deteriorating the signal-to-noise ratio (SNR) of the communication signal. Therefore, the spur performance of the frequency synthesizer is very important. [0003] The spur of the phase-locked loop frequency synthesizer is caused by a periodic fluctuation superimposed on the control signal of the voltage-controlled oscillator (VCO) to modulate the frequency of the voltage-controlled oscillator. The periodic fluctuation is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
CPCH02M3/073H02M3/077
Inventor 张吉利林福江
Owner UNIV OF SCI & TECH OF CHINA