Simple quadrature sinusoidal oscillator with orthogonal control using sigle active element

2012 ◽  
Author(s):  
Thanpong Pourak ◽  
Peerawut Suwanjan ◽  
Winai Jaikla ◽  
Suwat Maneewan
Keyword(s):  
Active Element ◽  
Sinusoidal Oscillator ◽  
Simple Quadrature

scholarly journals Operational Transresistance Amplifier-Based Multiphase Sinusoidal Oscillators

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Rajeshwari Pandey ◽  
Neeta Pandey ◽  
Mayank Bothra ◽  
Sajal K. Paul
Keyword(s):  
Single Phase ◽  
Phase Shifter ◽  
Active Element ◽  
Automatic Gain Control ◽  
Gain Control ◽  
The Third ◽  
Operational Transresistance Amplifier ◽  
Alternative Approach ◽  
Sinusoidal Oscillator ◽  
Tunable Oscillator

Multiphase sinusoidal oscillator circuits are presented which utilize Operational Transresistance Amplifier (OTRA) as the active element. The first circuit producesnodd-phase oscillations of equal amplitudes and equally spaced in phase. The second circuit is capable of producingnodd- or even- phase oscillations equally spaced in phase. An alternative approach is discussed in the third circuit, which utilizes a single-phase tunable oscillator circuit which is used to inject signals into a phase shifter circuits. An automatic gain control (AGC) circuit has been implemented for the second and third circuit. The circuits are simple to realize and have a low component count. PSPICE simulations have been given to verify the theoretical analysis. The experimental outcome corroborates the theoretical propositions and simulated results.

scholarly journals Multifunction Current Differencing Cascaded Transconductance Amplifier (MCDCTA) and Its Application to Current-Mode Multiphase Sinusoidal Oscillator

2015 ◽  
Vol 66 (5) ◽  
pp. 241-249 ◽  
Author(s):  
Chunhua Wang ◽  
Hairong Lin
Keyword(s):  
Active Element ◽  
Low Voltage ◽  
Current Mode ◽  
Output Impedance ◽  
Oscillation Condition ◽  
Transconductance Amplifier ◽  
Sinusoidal Oscillator ◽  
High Output Impedance ◽  
Processing Circuit ◽  
High Output

AbstractIn this study, a new versatile active element, namely multifunction current differencing cascaded transconductance amplifier (MCDCTA), is proposed. This device which adopts a simple configuration enjoys the performances of low-voltage, low-input and high-output impedance, wide bandwidth etc. It simplifies the design of the current-mode analog signal processing circuit greatly, especially the design of high-order filter and oscillator circuits. Moreover, an example as a new current-mode multiphase sinusoidal oscillator (MSO) using MCDCTA is described in this paper. The proposed oscillator, which employs only one MCDCTA and minimum grounded passive elements, is easy to be realized. It can provide random n (n being odd or even) output current signals and these output currents are equally spaced in phase all at high output impedance terminals. Its oscillation condition and the oscillation frequency can be adjusted independently, linearly and electronically by controlling the bias currents of MCDCTA. The operation of the proposed oscillator has been testified through PSPICE simulation and experimental results.

Signal and noise parameters of autodynes with the soft impedance characteristic of the active element (review)

2018 ◽  
Vol 1 (1) ◽  
pp. 29-47 ◽  
Author(s):  
V. Ya. Noskov ◽  
◽  
K. A. Ignatkov ◽  
D. Ya. Mishin ◽  
S. M. Smolskiy ◽  
...  
Keyword(s):  
Active Element ◽  
Impedance Characteristic ◽  
Noise Parameters

Design and realisation of a fractional-order sinusoidal oscillator

2020 ◽  
Vol 14 (8) ◽  
pp. 1173-1184
Author(s):  
İbrahim Ethem Saçu ◽  
Mustafa ALÇI
Keyword(s):  
Fractional Order ◽  
Sinusoidal Oscillator

scholarly journals Why simple quadrature is just as good as Monte Carlo

2020 ◽  
Vol 26 (1) ◽  
pp. 1-16
Author(s):  
Kevin Vanslette ◽  
Abdullatif Al Alsheikh ◽  
Kamal Youcef-Toumi
Keyword(s):  
Monte Carlo ◽  
Random Sampling ◽  
Bayesian Probability ◽  
Independent Factor ◽  
Worst Case ◽  
Statistical Equivalence ◽  
Deterministic Sampling ◽  
Quadrature Methods ◽  
Quadrature Sampling ◽  
Simple Quadrature

AbstractWe motive and calculate Newton–Cotes quadrature integration variance and compare it directly with Monte Carlo (MC) integration variance. We find an equivalence between deterministic quadrature sampling and random MC sampling by noting that MC random sampling is statistically indistinguishable from a method that uses deterministic sampling on a randomly shuffled (permuted) function. We use this statistical equivalence to regularize the form of permissible Bayesian quadrature integration priors such that they are guaranteed to be objectively comparable with MC. This leads to the proof that simple quadrature methods have expected variances that are less than or equal to their corresponding theoretical MC integration variances. Separately, using Bayesian probability theory, we find that the theoretical standard deviations of the unbiased errors of simple Newton–Cotes composite quadrature integrations improve over their worst case errors by an extra dimension independent factor {\propto N^{-\frac{1}{2}}}. This dimension independent factor is validated in our simulations.

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