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A Self-Stable Active Inductance Oscillator

An active inductor and oscillator technology, applied in the field of self-stabilizing active inductor oscillators, can solve problems such as low linearity, instability, and impact on use.

Active Publication Date: 2018-10-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional differential active inductors have the advantages of symmetry, high Q value, tunable Q value and inductance value, but compared with passive inductors, the lower linearity and instability affect its use in integrated circuits

Method used

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  • A Self-Stable Active Inductance Oscillator
  • A Self-Stable Active Inductance Oscillator
  • A Self-Stable Active Inductance Oscillator

Examples

Experimental program
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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as figure 1 As shown, a self-stabilizing active inductance oscillator provided by the present invention includes N constant transconductance generation circuits, N active differential inductance circuits, voltage stabilizing source circuits, inductance array control circuits and buffer circuits; each The constant transconductance generation circuits are all connected to an active differential inductance circuit; the N active differential inductance circuits are powered by a voltage-stabilizing source circuit, and are respectively connected to an inductance array control circuit and a buffer circuit.

[0019] Such as figure 2 As shown, the constant transconductance generating circuit includes a resistance circuit 1, PMOS transistors M1, M2, NMOS transistors M3, M4, capacitor C1, operational amplifier A1, the drain and gat...

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PUM

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Abstract

The invention discloses a self stabilizing-type active inductor oscillator. Based on the traditional active inductor oscillator, certain improvement is carried out in the stability aspect, and thus, problems of drastic inductance value change, large frequency drift and low value selection range of the active inductor under changes of PVT (Process Voltage Temperature). The oscillator comprises N constant transconductance generation circuits, N active differential inductance circuits, a voltage stabilizing source circuit, an inductance array control circuit and a buffer circuit, wherein each constant transconductance generation circuit is connected with one active differential inductance circuit; power of the N active differential inductance circuits is provided by the voltage stabilizing source circuit, and the N active differential inductance circuits are respectively connected with the inductance array control circuit and the buffer circuit. The constant transconductance generation circuits are used for generating constant transconductance in the active inductor, the inductance value is more accurate and stable in a different condition, and selection of the inductance array enables the inductor to have a wider working range.

Description

technical field [0001] The invention relates to the combination of a constant transconductance modulation method and an active inductance, thereby accurately modulating the inductance value and improving the stability of the inductance, and avoiding the occurrence of resistance components in the traditional active inductance value. Background technique [0002] The characteristics of large volume and low Q value of passive inductors make it difficult to integrate and miniaturize. Therefore, people develop equivalent inductance composed of active devices, hoping to replace passive inductance and meet the needs of integrated circuits. The asymmetry and limitations of single-ended active inductors make them inferior to differential active inductors. Traditional differential active inductors have the advantages of symmetry, high Q value, tunable Q value and inductance value, but compared with passive inductors, their lower linearity and instability affect their use in integrate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B5/04H03B5/12
CPCH03B5/04H03B5/1228H03B5/1265
Inventor 虞小鹏
Owner ZHEJIANG UNIV