A Current-Tunable Sinusoidal Quadrature Oscillator Using Signal-Differencing All-Pass Filters
نویسندگان
چکیده
An integrable current-tunable sinusoidal quadrature oscillator is presented. A current-tunable all-pass filter is used as the frequency-selective network. The implementation is fullybalanced so as to enable accurate quadrature signals with symmetry. The oscillation frequency is currenttunable over a wide-freqency sweep range of approximately three orders of magnitude. The quadrature signals possess the amplitude matching and the quadrature phase matching of better than 0.004 dB and 0.15°, respectively. The maximum useful frequency of oscillation is in excess of 8 MHz, and total harmonic distortions can be adjusted easily to be approximately 0.5 percent.
منابع مشابه
A High-Frequency Low-Power Low-Pass-Filter-Based All-Current-Mirror Sinusoidal Quadrature Oscillator
A high-frequency low-power sinusoidal quadrature oscillator is presented through the use of two 2-order low-pass current-mirror (CM)-based filters, a 1-order CM low-pass filter and a CM bilinear transfer function. The technique is relatively simple based on (i) inherent time constants of current mirrors, i.e. the internal capacitances and the transconductance of a diode-connected NMOS, (ii) a s...
متن کاملCompact electronically tunable quadrature oscillator using single voltage differencing gain amplifier (VDGA) and all grounded passive elements
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 oscillato...
متن کاملNovel minimum-component universal filter and quadrature oscillator with electronic tuning property based on CCCDBAs
The novel current-tunable voltage-mode universal biquad filter and sinusoidal quadrature oscillator using only two current-controlled current differencing buffered amplifiers (CCCDBAs) and two capacitors without external passive resistors have been presented. The first proposed filter realizes all the five standard types of the biquadratic functions and provides independent electronic tuning of...
متن کاملRealization of electronically tunable voltage-mode/current-mode quadrature sinusoidal oscillator using ZC-CG-CDBA
This paper presents a first of its kind canonic realization of active RC (ARC) sinusoidal oscillator with non-interactive/independent tuning laws, which simultaneously provides buffered quadrature voltage outputs and explicit quadrature current outputs. The proposed circuit is created using a new active building block, namely the Z-copy controlled-gain current differencing buffered amplifier (Z...
متن کاملResistorless Current-mode Quadrature Sinusoidal Oscillator Using CDTAs
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 f...
متن کامل