On practical construction of electronically controllable compact current amplifier based on commercially available elements and its application

Šotner, Roman; Herencsár, Norbert; Jeřábek, Jan; Langhammer, Lukáš; Polák, Josef

doi:10.1016/j.aeue.2017.07.002

Cited by 11 publications

(32 citation statements)

References 22 publications

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“…The proposed oscillator consists of three LT1228s, two grounded capacitors (C 1 and C 2 ) and one resistor R, where the lossy integrator is constructed from LT1228-1 and C 1 , the lossless integrator is constructed from LT1228-2 and C 2 , and the voltage amplifier with a voltage summing circuit is constructed from LT1228-3, R, and LT1228-2. Note that most of commercially available IC based quadrature oscillators proposed in [22][23][24][25][26][27][28][29][30][31] use the difference type of commercially available ICs, but the proposed oscillator uses only three LT1228s. Only the quadrature oscillator in [21] uses the same type of commercially available IC (LT1228), but it requires five LT1228s.…”

Section: Proposed Core Quadrature Sinusoidal Oscillatormentioning

confidence: 99%

“…From (20) and (21), it is found that the amplitude of quadrature output voltages is controllable without using additional active devices, but this feature of the commercially available IC based quadrature oscillators in [22][23][24][25][26][27][28][29][30][31] is not available. Furthermore, the quadrature output voltage nodes of the oscillator in [22][23][24][25]27,29,31] are not of low impedance, requiring the voltage buffer for cascading. Thus, the frequency of oscillation (f 0 ) is obtained by (12) and the condition of oscillation is given by…”

Section: Proposed Quadrature Sinusoidal Oscillator With Amplitude Conmentioning

confidence: 99%

“…The similar feature for electronic control of FO and CO is available in the presented quadrature oscillators in [21][22][23][24][25][26][28][29][30]. However, the option of a linear tune of FO is not obtained for works in Refs.…”

Section: Proposed Quadrature Sinusoidal Oscillator With Amplitude Conmentioning

confidence: 99%

“…From (24), the frequency of oscillation is easily controlled by a microcomputer or microcontroller using an analog pin or digital-to-analog (DAC) circuit. For amplitude stabilization and automatic control of condition of oscillation, the automatic gain control (AGC) circuit is required [28] as shown in Figure 6.…”

Section: Effect Of Parasitic Elementsmentioning

confidence: 99%

“…The synthesis of an analog circuit using commercially available ICs have been continuously proposed [16][17][18][19][20]. Especially the designs of voltage or current controlled quadrature sinusoidal oscillators using commercially available ICs have been found in the open literature [21][22][23][24][25][26][27][28][29][30][31]. Moreover, the linear voltage controlled sinusoidal oscillator using commercially available ICs-based CCII was proposed in [32].…”

Section: Introductionmentioning

confidence: 99%

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Current/Voltage Controlled Quadrature Sinusoidal Oscillators for Phase Sensitive Detection Using Commercially Available IC

Jaikla

Adhan

Suwanjan

et al. 2020

Sensors

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This paper presents the quadrature sinusoidal oscillators for a phase sensitive detection (PSD) system. The proposed oscillators are design by using the commercially available ICs (LT1228). The core oscillator consists of three LT1228s: two grounded capacitors and one resistor. By adding four resistors without the requirement of additional active devices, the amplitudes of two quadrature waveforms become adjustable. The quadrature output nodes are of low impedance, which can be connected to the impedance sensor or other circuits in a phase sensitive detection system without the need of buffer devices. The amplitudes of the quadrature waveform are equal during the frequency of oscillation (FO) tuning. The frequency of oscillation is electronically and linearly controlled by bias current or voltage without affecting the condition of oscillation (CO). Furthermore, the condition of oscillation is electronically controlled without affecting the frequency of oscillation. The performances of the proposed oscillators are experimentally tested with ±5 voltage power supplies. The frequency of the proposed sinusoidal oscillator can be tuned from 8.21 kHz to 1117.51 kHz. The relative frequency error is lower than 3.12% and the relative phase error is lower than 2.96%. The total harmonic distortion is lower than −38 dB (1.259%). The voltage gain of the quadrature waveforms can be tuned from 1.97 to 15.92. The measurement results demonstrate that the proposed oscillators work in a wide frequency range and it is a suitable choice for an instrument-off-the-shelf device

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Section: Proposed Core Quadrature Sinusoidal Oscillatormentioning

confidence: 99%

Section: Proposed Quadrature Sinusoidal Oscillator With Amplitude Conmentioning

confidence: 99%

Section: Proposed Quadrature Sinusoidal Oscillator With Amplitude Conmentioning

confidence: 99%

Section: Effect Of Parasitic Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Current/Voltage Controlled Quadrature Sinusoidal Oscillators for Phase Sensitive Detection Using Commercially Available IC

Jaikla

Adhan

Suwanjan

et al. 2020

Sensors

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show abstract

Practical design of the voltage controllable quadrature oscillator for operation in MHz bands employing new behavioral model of variable-voltage-gain current conveyor of second generation

et al. 2018

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Applications of novel behavioral implementation of a controllable generalized current conveyor

Šotner

Langhammer

Petržela

et al. 2018

2018 28th International Conference Radioelektronika (RADIOELEKTRONIKA)

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This contribution presents a novel modification of a behavioral model for a generalized current conveyor of second generation based on commercially available active devices. This model is suitable for preliminary tests of applications before demanding stage of expensive IC design and fabrication starts. Its main features aim at simplifying and unifying topology where three independently electronically adjustable parameters are available. Operation of the model is verified in several introduced applications (an electronically reconfigurable filter and generation of sine waveform). Substantial extension of tunability has been obtained in applying the model in the proposed oscillator in comparison to the standard linear tuning method. All expectations were confirmed by PSpice simulations.

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On practical construction of electronically controllable compact current amplifier based on commercially available elements and its application

Cited by 11 publications

References 22 publications

Current/Voltage Controlled Quadrature Sinusoidal Oscillators for Phase Sensitive Detection Using Commercially Available IC

Current/Voltage Controlled Quadrature Sinusoidal Oscillators for Phase Sensitive Detection Using Commercially Available IC

Practical design of the voltage controllable quadrature oscillator for operation in MHz bands employing new behavioral model of variable-voltage-gain current conveyor of second generation

Applications of novel behavioral implementation of a controllable generalized current conveyor

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