Search Results

Now showing 1 - 6 of 6

Some of the metrics are blocked by your
consent settings
Single VDGA-based dual-mode multifunction biquadratic filter and quadrature sinusoidal oscillator
(2020-01-01)
Tangsrirat, Worapong
;
Pukkalanun, Tattaya
;
Channumsin, Orapin
This article relates to the realization of voltage-mode and/or current-mode multifunction biquadratic filter and quadrature oscillator circuits each using one voltage differencing gain amplifier (VDGA), two resistors and two grounded capacitors. The proposed dual-mode filter having one output and three inputs can provide the three standard biquadratic transfer functions with both voltage and current output filter responses simultaneously. It also has the independent tuning of the angular resonance frequency and the quality factor. With a slight modification of the proposed filter, a new dual-mode quadrature sinusoidal oscillator can be obtained. The proposed quadrature oscillator provides orthogonal resistive/electronic control of both oscillation condition and oscillation frequency. Non-ideal and parasitic conditions are also examined and their effects on the circuit performance are discussed. To confirm the theory, several computer simulation results with PSPICE program are given.
Some of the metrics are blocked by your
consent settings
Compact quadrature oscillator with voltage and current outputs using only single VDTA and grounded capacitors
(2017-04-01)
Tangsrirat, Worapong
A possible design of the compact sinusoidal quadrature oscillator using single voltage differencing transconductance amplifier (VDTA) and only two grounded capacitors has been presented. The presented quadrature oscillator provides the following attractive properties: (i) canonic form and resistor less structure; (ii) availability of the explicit quadrature voltage outputs and current outputs; (iii) electronic controllability of the oscillation frequency (Ω<inf>0</inf>); and (iv) low active and passive sensitivities. To support the validity of the oscillator, PSPICE simulation results have also been provided.
Some of the metrics are blocked by your
consent settings
VDIBA-based sinusoidal quadrature oscillator
(2017-01-01)
Channumsin, Orapin
;
Tangsrirat, Worapong
An electronically tunable voltage-mode sinusoidal quadrature oscillator circuit, which is based on using the recently introduced active building block, namely voltage differencing inverting voltage buffered amplifier (VDIBA) has been presented. The presented quadrature oscillator uses two VDIBAs, one electronic grounded resistor, and two grounded passive capacitors, suitable for MOS-C realization. The circuit performs an single-element-controlled oscillator and provides the advantage features of independent electronic control of oscillation condition and oscillation frequency. The workability of the proposed circuit has been verified using PSPICE simulations based on VDIBA implemented in TSMC 0.25-µm CMOS technology, and the simulated results demonstrate a sufficient agreement with the theoretical conclusions.
Some of the metrics are blocked by your
consent settings
Compact electronically tunable quadrature oscillator using single voltage differencing gain amplifier (VDGA) and all grounded passive elements
(2017-01-01)
Channumsin, Orapin
;
Tangsrirat, Worapong
This work deals with the design of a compact electronically tunable sinusoidal quadrature oscillator. The proposed quadrature oscillator is designed with a single voltage differencing gain amplifier (VDGA) and all the three grounded passive elements. Its oscillation condition and oscillation frequency can be tuned independently by means of the VDGA transconductance gains. The proposed oscillator also provides the explicit quadrature voltage outputs of almost equal magnitude and low active and passive sensitivity figures. The performance of the oscillator has been demonstrated by PSPICE simulations based on TSMC 0.35-μm CMOS technology.
Some of the metrics are blocked by your
consent settings
Current-mode high-Q bandpass filter and mixed-mode quadrature oscillator using ZC-CFTAs and grounded capacitors
(2012-08-01)
Tangsrirat, Worapong
;
Mongkolwai, Pratya
;
Pukkalanun, Tattaya
This paper presents the realization of the current-mode bandpass filter and mixed-mode quadrature oscillator both from the same circuit configuration. The proposed circuit is in the resistor-less structure, which contains only four z-copy current follower transconductance amplifiers (ZC-CFTAs) as active components together with two grounded capacitors as passive components. As the first configuration, the current-mode BP filter with high quality factor (Q) is proposed. The center frequency (wo) and the Q of the circuit are orthogonal adjustable via the gm-value of the ZC-CFTA. From the same topology, the mixed-mode quadrature oscillator can easily be realized that is capable of generating two explicit quadrature current outputs and two quadrature voltage outputs, simultaneously. Moreover, the realized oscillator also provides the advantage of orthogonal electronic control of the oscillation condition and oscillation frequency, which makes it suitable as variable frequency oscillator. PSPICE simulation results using bipolar ZC-CFTA have been given to verify the workability of the two proposed circuits.
Some of the metrics are blocked by your
consent settings
Resistorless current-mode quadrature sinusoidal oscillator using CDTAs
(2009-12-01)
Tanjaroen, Wason
;
Tangsrirat, Worapong
A circuit technique for realizing a current-mode quadrature sinusoidal oscillator using current differencing transconductance amplifiers (CDTAs) as active components is presented in this paper. The proposed circuit employing only three CDTAs and two grounded capacitors can provide two quadrature sinusoidal current outputs with 90° phase difference. The oscillation condition and the oscillation frequency (ω<inf>o</inf>) of the proposed circuit can be electronically and orthogonally tuned. Simulation results with PSPICE are used to confirm the presented theory.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results