Title :
A wide-tunable translinear second-order oscillator
Author :
Serdijn, Wouter A. ; Mulder, Jan ; van der Woerd, Albert C. ; Van Roermund, Arthur H M
Author_Institution :
Fac. of Electr. Eng., Delft Univ. of Technol., Netherlands
fDate :
2/1/1998 12:00:00 AM
Abstract :
This paper describes the design and measurement of a translinear second-order oscillator. The circuit is a direct implementation of a nonlinear second-order differential equation 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 wide frequency range by only one control current, which indicates its suitability for spread-spectrum communications. Its total harmonic distortion can be made small by the design, which enables fully integrated transmitters. A semicustom test chip, fabricated in a standard 2-μm, 7-GHz, bipolar IC process, operates from a single supply voltage, which can be as low as 2 V and oscillates over six decades of frequency with -31 dB total harmonic distortion
Keywords :
circuit tuning; harmonic distortion; nonlinear differential equations; nonlinear network synthesis; variable-frequency oscillators; 1.7 MHz; 2 V; 2 micron; 7 GHz; bipolar IC process; bipolar transistors; nonlinear second-order differential equation; second-order oscillator; semicustom test chip; single supply voltage; spread-spectrum communications; synthesis method; total harmonic distortion; translinear oscillator; wide-tunable oscillator; Bipolar transistors; Capacitors; Circuit synthesis; Communication system control; Differential equations; Frequency; Oscillators; Spread spectrum communication; Total harmonic distortion; Transmitters;
Journal_Title :
Solid-State Circuits, IEEE Journal of
