scholarly journals Electronically Tunable Sinusoidal Oscillator Circuit

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Sudhanshu Maheshwari ◽  
Rishabh Verma
Keyword(s):  
Frequency Tuning ◽  
Current Mode ◽  
Bias Current ◽  
Cmos Process ◽  
Third Order ◽  
Passive Components ◽  
Sinusoidal Oscillator ◽  
Wide Range ◽  
Tunable Frequency ◽  
Electronically Tunable

This paper presents a novel electronically tunable third-order sinusoidal oscillator synthesized from a simple topology, employing current-mode blocks. The circuit is realized using the active element: Current Controlled Conveyors (CCCIIs) and grounded passive components. The new circuit enjoys the advantages of noninteractive electronically tunable frequency of oscillation, use of grounded passive components, and the simultaneous availability of three sinusoidal voltage outputs. Bias current generation scheme is given for the active elements used. The circuit exhibits good high frequency performance. Nonideal and parasitic study has also been carried out. Wide range frequency tuning is shown with the bias current. The proposed theory is verified through extensive PSPICE simulations using 0.25 μm CMOS process parameters.

scholarly journals New Electronically Tunable Third Order Filters and Dual Mode Sinusoidal Oscillator Using VDTAs and Grounded Capacitors

2021 ◽  
Vol 6 (4) ◽  
pp. 262-281
Author(s):  
Tapas Kumar Paul ◽  
Radha Raman Pal
Keyword(s):  
Integrated Circuits ◽  
Current Mode ◽  
Third Order ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Low Pass ◽  
Component Matching ◽  
Band Pass ◽  
Transconductance Amplifiers ◽  
Electronically Tunable

This study introduces a third order filter and a third order oscillator configuration. Both the circuits use two voltage difference transconductance amplifiers (VDTAs) and three grounded capacitors. By selecting the input and output terminals properly, current mode and transimpedance mode low-pass and band-pass filters can be obtained without component matching conditions. The natural frequency (ω0) can be tuned electronically. The oscillator circuit provides voltage and current outputs explicitly. The condition of oscillation (CO) and the frequency of oscillation (FO) can be adjusted orthogonally and electronically. The workability of the configurations is judged using TSMC CMOS 0.18 μm technology parameter as well as commercially available LM13700 integrated circuits (ICs). The simulation results show that: for ±0.9V power supply, the power consumption is 1.08 mW for both the configurations, while total harmonic distortions (THDs) are less than 2.06% and 2.17% for the filter and oscillator configurations, respectively.

scholarly journals Electronically Tunable Quadrature Oscillator Using Translinear Conveyors and Grounded Capacitors

2003 ◽  
Vol 26 (3) ◽  
pp. 193-196 ◽  
Author(s):  
Sudhanshu Maheshwari
Keyword(s):  
Frequency Control ◽  
Current Mode ◽  
Current Control ◽  
External Current ◽  
Quadrature Oscillator ◽  
Sinusoidal Oscillator ◽  
Wide Range ◽  
Simulation Results ◽  
Electronically Tunable

A new electronically tunable current-mode sinusoidal oscillator with three quadrature outputs is presented. The proposed circuit employs three translinear conveyors and two grounded capacitors to realize three quadrature outputs with independent frequency control. The circuit requires no resistors and the frequency of the oscillator can be varied over a wide range by external current control. RSPICE simulation results using the bipolar implementation of translinear conveyors are given to support the proposed circuit.

scholarly journals Electronically Tunable Quadrature Sinusoidal Oscillator with Equal Output Amplitudes during Frequency Tuning Process

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Den Satipar ◽  
Pattana Intani ◽  
Winai Jaikla
Keyword(s):  
Frequency Tuning ◽  
Digital Circuit ◽  
Bias Current ◽  
Experimental Results ◽  
Current Conveyors ◽  
Active Device ◽  
Output Terminal ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Electronically Tunable

A new configuration of voltage-mode quadrature sinusoidal oscillator is proposed. The proposed oscillator employs two voltage differencing current conveyors (VDCCs), two resistors, and two grounded capacitors. In this design, the use of multiple/dual output terminal active building block is not required. The tuning of frequency of oscillation (FO) can be done electronically by adjusting the bias current of active device without affecting condition of oscillation (CO). The electronic tuning can be done by controlling the bias current using a digital circuit. The amplitude of two sinusoidal outputs is equal when the frequency of oscillation is tuned. This makes the sinusoidal output voltages meet good total harmonic distortions (THD). Moreover, the proposed circuit can provide the sinusoidal output current with high impedance which is connected to external load or to another circuit without the use of buffer device. To confirm that the oscillator can generate the quadrature sinusoidal output signal, the experimental results using VDCC constructed from commercially available ICs are also included. The experimental results agree well with theoretical anticipation.

Electronically Tunable Current-Mode Third-Order Square-Root-Domain Filter Design

2018 ◽  
Vol 27 (09) ◽  
pp. 1850136
Author(s):  
Ali Kircay ◽  
M. Serhat Keserlioglu ◽  
F. Zuhal Adalar
Keyword(s):  
Filter Design ◽  
Current Mode ◽  
Cmos Process ◽  
Square Root ◽  
Third Order ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Level 3 ◽  
Electronically Tunable

In this study, electronically-tunable, current-mode, square-root-domain, third-order low-pass filter is proposed. The study is carried out with three circuit designs. First circuit is third-order low-pass Butterworth filter, second circuit is third-order low-pass Chebyshev filter and the last circuit is third-order low-pass elliptic filter. All the input and output values of the filter circuit are current. Only grounded capacitors and MOSFETs are required in order to realize the filter circuit. Additionally, natural frequency [Formula: see text] of the current-mode filter can be adjusted electronically using outer current sources. To validate the theory and to demonstrate the performance of third-order filter, frequency and time domain simulations of PSPICE program are used. To that end, TSMC 0.35[Formula: see text][Formula: see text]m Level 3 CMOS process parameters are utilized to realize the simulations of the filter.

Current Mode and Voltage Mode Third Order Sinusoidal Oscillator Using CCDDCCTA

2020 ◽  
Vol 10 (4) ◽  
pp. 486-492
Author(s):  
Ajay K. Kushwaha ◽  
Ashok Kumar ◽  
Prakash Pareek
Keyword(s):  
Output Voltage ◽  
Current Mode ◽  
Monte Carlo Analysis ◽  
Bias Current ◽  
Current Conveyor ◽  
Output Current ◽  
Third Order ◽  
Transconductance Amplifier ◽  
Sinusoidal Oscillator ◽  
Circuit Configuration

Objective: In this paper, a novel third order sinusoidal oscillator based on current controlled differential difference current conveyor transconductance amplifier (CCDDCCTA) is proposed. Methods: The proposed circuit configuration consist of single CCDDCCTA, two grounded resistor and three capacitors. It can concurrently yield output voltage and current. The amplitude of output current can be easily tuned by the bias current. The non-ideality and Monte-Carlo analysis are discussed and presented. Results: The stated results agree well with the theoretical estimation. Conclusion: The performance ofa proposed oscillator are analyzed with ORCAD 16.6 simulator and the analog block has been depicted using 0.25 μm CMOS TSMC technology parameters.

An Active-C Current-Mode Universal First-Order Filter and Oscillator

2019 ◽  
Vol 28 (13) ◽  
pp. 1950219 ◽  
Author(s):  
D. Agrawal ◽  
S. Maheshwari
Keyword(s):  
Transfer Functions ◽  
Current Mode ◽  
Cmos Technology ◽  
Monte Carlo Analysis ◽  
Passive Element ◽  
First Order ◽  
Order Filter ◽  
Sinusoidal Oscillator ◽  
High Output Impedance ◽  
Electronically Tunable

This paper presents an electronically tunable current-mode first-order universal filter. The proposed circuit employs only a single Extra-X Current-Controlled Conveyor (EX-CCCII) and a single grounded capacitor, which is suitable for IC implementation. The circuit can realize three current transfer functions simultaneously, namely low-pass, high-pass and all-pass. The proposed circuit exhibits low-input and high-output impedance, which is suitable for cascading. The pole frequency of the filter can be electronically tuned, by varying the bias current of EX-CCCII. The nonidealities and parasitic effects on the circuit performance are investigated in detail. Also, the Monte Carlo analysis is done to show the effect of active and passive element mismatches on the pole frequency. An eight-phase current-mode sinusoidal oscillator and current-mode second-order filter are further realized using the proposed circuit. The functionality of the proposed circuits is verified through PSPICE simulations, using 0.25-[Formula: see text]m TSMC CMOS technology parameters.

AN ELECTRONICALLY TUNABLE OSCILLATOR USING A SINGLE ACTIVE DEVICE AND TWO CAPACITORS

2008 ◽  
Vol 17 (05) ◽  
pp. 885-891 ◽  
Author(s):  
M. KOKSAL ◽  
M. SAGBAS ◽  
H. SEDEF
Keyword(s):  
Current Mode ◽  
Experimental Results ◽  
Current Mode Circuits ◽  
Active Device ◽  
Passive Components ◽  
Minimum Number ◽  
Electronically Tunable ◽  
A Current ◽  
Tunable Oscillator

A novel resistorless oscillator is presented. The proposed structure enjoys electronic tunability property with minimum number of active and passive components. This oscillator uses a current-mode (CM) active device and has properties of current mode circuits. The validity of the proposed circuit is verified by experimental results.

scholarly journals A Design of Wide-Range and Low Phase Noise Linear Transconductance VCO with 193.76 dBc/Hz FoMT for mm-Wave 5G Transceivers

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 935 ◽  
Author(s):  
Arash Hejazi ◽  
YoungGun Pu ◽  
Kang-Yoon Lee
Keyword(s):  
Phase Noise ◽  
Carrier Frequency ◽  
Tuning Range ◽  
Frequency Tuning ◽  
Cmos Process ◽  
Switched Capacitor ◽  
Voltage Controlled Oscillator ◽  
Wide Range ◽  
Layout Area ◽  
Low Phase Noise

This paper presents a wide-range and low phase noise mm-Wave Voltage Controlled Oscillator (VCO) based on the transconductance linearization technique. The proposed technique eliminates the deep triode region of the active part of the VCO, and lowers the noise introduced by the gm-cell. The switch sizes inside the switched capacitor bank of the VCO are optimized to minimize the resistance of the switches while keeping the wide tuning range. A new layout technique shortens the routing of the VCO outputs, and lowers the parasitic inductance and resistance of the VCO routing. The presented method prevents the reduction of the quality factor of the tank due to the long routing. The proposed VCO achieves a discrete frequency tuning range, of 14 GHz to 18 GHz, through a linear coarse and middle switched capacitor array, and offers superior phase noise performance compared to recent state-of-the-art VCO architectures. The design is implemented in a 45 nm CMOS process and occupies a layout area (including output buffers) of 0.14 mm2. The power consumption of the VCO core is 24 mW from the power supply of 0.8 V. The post-layout simulation result shows the VCO achieves the phase noise performances of −87.2 dBc/Hz and −113 dBc/Hz, at 100 kHz and 1 MHz offset frequencies from the carrier frequency of 14 GHz, respectively. In an 18 GHz carrier frequency, the results are −87.4 dBc/Hz and −110 dBc/Hz, accordingly.

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