A Precise 90<tex>$^circ$</tex>Quadrature OTA-C Oscillator Tunable in the 50–130-MHz Range
نویسندگان
چکیده
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 کاملOn the Design of Linearly Tunable Wide Input Voltage Range CMOS OTA and Its Application
In this paper, a CMOS OTA with a wide input voltage range and linearly tunable transconductance gain (gm) is presented. To achieve the linear control of transconductance, the bias current (IB) is squared by using the current squarer circuit before applying it into the main CMOS OTA. In addition, the source degeneration technique is used to extend the input voltage range. The frequency response ...
متن کاملA translinear SiGe BiCMOS current-controlled oscillator with 80 Hz–800 MHz tuning range
A 3-phase current controlled sinusoidal oscillator, tunable over a wide range of frequencies is presented. The oscillator comprises a ring of 3 cascaded differential Gm C low-pass filter stages, implemented in a fully translinear, NPN-only circuit. Closed-form analytical expressions are derived to quantify both frequency and amplitude tuning, as a function of two current biases. Experimental re...
متن کاملExtended-cavity, tunable, GHz-repetition-rate femtosecond optical parametric oscillator pumped at 76 MHz.
We report the generation of tunable GHz-repetition-rate femtosecond pulses in a synchronously-pumped optical parametric oscillator (SPOPO) with extended cavity length pumped by a 76 MHz Kerr-lens mode-locked Ti:sapphire laser. In a SPOPO based on periodically-poled LiNbO3, insertion of a prism pair for dispersion compensation internal to the linear cavity provides stable output pulse trains of ...
متن کاملFrequency-tunable micromechanical oscillator
An experimental method, employing a scanning tunneling microscope ~STM! as an actuator and a scanning electron microscope ~SEM! as a motion detector, was developed to study microelectromechanical systems ~MEMS! and has been applied to study microfabricated cantilever beams. Vibrations actuated by an ac voltage applied to the piezodrive are transferred to the sample by the STM tip, which also pr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Circuits and Systems I: Regular Papers
سال: 2004
ISSN: 1057-7122
DOI: 10.1109/tcsi.2004.823673