电压可调阻抗函数:线性压控正交振荡器的实现

Q3 Engineering

International Journal of Electronics Letters Pub Date : 2022-01-03 DOI:10.1080/21681724.2021.2025441

K. Mathur, R. Nandi

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引用次数: 2

摘要

提出了一种新的电压可调阻抗函数(VTIF)实现方案。本文介绍了两种接地、高质量(Q)谐振滤波器和具有线性调谐律的压控正交振荡器(VCQO)。分析表明，滤波器/QO参数不受ABB寄生分量的影响。实验结果表明，使用电流反馈放大器(CFA)和模拟电压乘法器作为有源模块(ABB)，获得了0 ~14 MHz的vcqo线性调谐范围和令人满意的相位噪声裕度，即电感(L)和频率相关负电阻(D)。随后，lc -带通和rd -带阻选择性滤波器的实现，以及QO设计，在30 kHz偏移时具有低THD和(─)104 dBc/Hz的相位噪声。采用标准的市售集成电路模块对所提出电路的实验结果进行了满意的验证。

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Voltage-tunable immittance functions: Linear voltage-controlled quadrature oscillator implementation

ABSTRACT A new scheme on the realisation of voltage-tunable immittance function (VTIF) is proposed. Here two types of grounded, high-quality (Q) resonant filters and voltage-controlled quadrature oscillators (VCQO) with a linear tuning law are presented. Analysis indicates that the filter/QO parameters are impervious to the ABB parasitic components. Experimental results exhibit a VCQO-linear tuning range of fo ~14 MHz with a satisfactory phase-noise margin of immittances, viz., inductance (L) and frequency-dependent negative resistance (D) are derived using the Current Feedback Amplifier (CFA) combined with analog voltage-multiplier elements as the active building block (ABB). Subsequently, implementation of LC-bandpass and rD-band-reject selective filters, along with QO designs, is presented with low THD and phase noise of (─)104 dBc/Hz at 30 kHz offset. Experimental results of the proposed circuits had been satisfactorily verified using standard commercially available IC modules.

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来源期刊

International Journal of Electronics Letters Engineering-Electrical and Electronic Engineering

CiteScore

1.80

自引率

0.00%

发文量

期刊介绍： International Journal of Electronics Letters (IJEL) is a world-leading journal dedicated to the rapid dissemination of new concepts and developments across the broad and interdisciplinary field of electronics. The Journal welcomes submissions on all topics in electronics, with specific emphasis on the following areas: • power electronics • embedded systems • semiconductor devices • analogue circuits • digital electronics • microwave and millimetre-wave techniques • wireless and optical communications • sensors • instrumentation • medical electronics Papers should focus on technical applications and developing research at the cutting edge of the discipline. Proposals for special issues are encouraged, and should be discussed with the Editor-in-Chief.