100 years of Colpitts Oscillators: Ontology Review of Common Oscillator Circuit Topologies

Azadmehr, Mehdi; Paprotny, Igor; Marchetti, Luca

doi:10.1109/mcas.2020.3027334

Cited by 15 publications

(4 citation statements)

References 83 publications

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“…We tried to compare typical narrow-band solutions of LC oscillators intended for high-frequency purposes with our design. The proposed solution seems to be slightly complex but the intended application bandwidths (kHz, MHz) do not allow us to implement the method used in the published solutions (see Table 2 and circuits in [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 ]). This is because of the values and physical realization of integrated inductors (unsuitable for low frequencies due to values in nH and also their implementation).…”

Section: Application Examplesmentioning

confidence: 99%

“…The electronic tunability of the oscillation frequency by the inductance value (as presented in our case) has not been tested in recently published works because it has certain limitations, especially at high frequencies (extensive active circuitries), but can be used without issues in kHz and MHz bands with significant advantages (wideband tuning). The wideband tunability of the frequency with almost constant output levels and low THD requires the implementation of a circuit for amplitude stabilization, which is standardly not used in LC oscillators (including the Colpitts type) because of their narrowband tunability [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 ].…”

Section: Application Examplesmentioning

confidence: 99%

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Electronic Tunability and Cancellation of Serial Losses in Wire Coils

Šotner

Jeřábek

Polák

et al. 2022

Sensors

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This work presents a novel methodology to adjust the inductance of real coils (electronically) and to cancel out serial losses (up to tens or even hundreds of Ohms in practice) electronically. This is important in various fields of electromagnetic sensors (inductive sensors), energy harvesting, measurement and especially in the instrumentation of various devices. State-of-the-art methods do not solve the problem of cancellation of real serial resistance, which is the most important parasitic feature in low- and middle-frequency bands. In this case, the employment of serial negative resistance is not possible due to stability issues. To solve this issue, two solutions allowing the cancellation of serial resistance by the value of the passive element and an electronically adjustable parameter are introduced. The operational ranges are between 0.1 and 1 mH and 0.1 and 10 mH, valid in bandwidths from hundreds of Hz up to hundreds of kHz. The proposed concepts are experimentally tested in two applications: an electronically tunable oscillator of LC type and an electronically tunable band-pass RLC filter. The presented methodology offers significant improvements in the process of circuit design employing inductors and can be beneficially used for on-chip design, where serial resistance issues can be very significant.

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Section: Application Examplesmentioning

confidence: 99%

Section: Application Examplesmentioning

confidence: 99%

Electronic Tunability and Cancellation of Serial Losses in Wire Coils

Šotner

Jeřábek

Polák

et al. 2022

Sensors

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“…Chaotic signals, referring to random and unpredictable signals, have been highlighted in several fields such as highresolution radar ranging [1][2][3], broadband secure communication [4][5][6], and random number generation [7][8][9]. In general, complex chaotic signals are generated by the electrical methods, such as the oscillation circuits [10][11] or the field programmable gate array [12][13]. However, suffered from the electrical bottleneck, chaotic signals generation based on the electrical methods are narrowband, which cannot meet the ever-increasing requirement of the high-resolution radar and the broadband secure communication.…”

Section: Introductionmentioning

confidence: 99%

Suppression of time-delayed signature in chaotic signals based on optoelectronic hybrid feedbacks

Xu,

Zeng,

Zhang

et al. 2023

AOPC 2023: AI in Optics and Photonics

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“…Recently, an ontology review paper has been published to present the Colpitts development from 1918 until 2018 realized by vacuum tubes, the bipolar junction transistors (BJTs) and MOSFETs 4 . In this review paper, the several Colpitts oscillators are described and categorized based on the gain stage such as common drain, common source, and common gate in CMOS technology or similarly in bipolar technology.…”

Section: Introductionmentioning

confidence: 99%

Analysis and review of main characteristics of Colpitts oscillators

Hemmati

Dehghani

2021

Circuit Theory & Apps

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Summary In this review, different topologies of CMOS Colpitts oscillators including single‐ended and differential configurations are studied, and the main specifications of them are presented. The studied LC tank Colpitts oscillators operating at gigahertz frequencies are categorized in several main structures to have more insight into their comparison. Also, the main characteristics of the Colpitts voltage‐controlled oscillators (VCOs) are compared and analyzed according to their configurations and calculated results of their transconductances. Besides, the Colpitts quadrature voltage‐controlled oscillators (QVCOs) realized by the mentioned VCOs are studied and categorized. Also, the various coupling techniques adopted in each QVCO to generate output signals with 90° phase differences are highlighted.

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100 years of Colpitts Oscillators: Ontology Review of Common Oscillator Circuit Topologies

Cited by 15 publications

References 83 publications

Electronic Tunability and Cancellation of Serial Losses in Wire Coils

Electronic Tunability and Cancellation of Serial Losses in Wire Coils

Suppression of time-delayed signature in chaotic signals based on optoelectronic hybrid feedbacks

Analysis and review of main characteristics of Colpitts oscillators

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