Amplitude Stabilization in Quadrature Oscillator for Low Harmonic Distortion
نویسنده
چکیده
A simple non-linear network for amplitude stabilization in harmonic quadrature oscillator (QO) is analyzed. The oscillation startup conditions for QO topology with two operational amplifiers are used for amplitude adjustment by element values. A closed form expression for the amplitude setting resistance is derived. Total harmonic distortion (THD) is expressed as closed form function of the established amplitude. The derived expressions as well as the oscillator performance are verified by computer simulations and measurements.
منابع مشابه
A Linearly-tunable Ota-c Sinusoidal Oscillator for Low- Voltage Applications
A low-voltage, low-power OTA-C sinusoidal oscillator based on a triode-MOSFET transconductor is here discussed. The classical quadrature model is employed and the transconductor inherent nonlinear characteristic with input voltage is used as the amplitude-stabilization element. An external bias VTUNE linearly adjusts the oscillation frequency. According to a standard 0.8μm CMOS n-well process, ...
متن کاملA 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 کاملA low-voltage translinear second-order quadrature oscillator
This paper describes the design of a low-voltage translinear second-order quadrature oscillator. The circuit is a direct implementation of a nonlinear second-order state-space description and follows from a recently developed synthesis method for dynamic translinear circuits. It comprises only two capacitors and a handful of bipolar transistors and can be instantaneously controlled over a very ...
متن کاملA Current-Tunable Sinusoidal Quadrature Oscillator Using Signal-Differencing All-Pass Filters
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 pos...
متن کاملSolution of strongly nonlinear oscillator problem arising in Plasma Physics with Newton Harmonic Balance Method
In this paper, Newton Harmonic Balance Method (NHBM) is applied to obtain the analytical solution for an electron beam injected into a plasma tube where the magnetic field is cylindrical and increases towards the axis in inverse proportion to the radius. Periodic solution is analytically verified and consequently the relation between the Natural Frequency and the amplitude is obtained in an ana...
متن کامل