Title :
A versatile monolithic 800 kHz to 800 MHz phase-startable oscillator
Author :
Dobos, Laszlo ; Jensen, Brent
Author_Institution :
Tektronix Inc., Beaverton, OR, USA
Abstract :
A phase-startable voltage controlled oscillator is achieved that covers the frequency range of 800 kHz to 800 MHz using a modified multivibrator topology. The IC was fabricated on a recently developed highspeed complementary bipolar process (vertical NPN ftau=9 GHz and vertical PNP fτ=5.5 GHz). The IC operates from ±5 volt supplies, and provides linearly adjustable frequency over a 500:1 range as well as a linearly adjustable period over a 4:1 range. The design exhibits an extremely short startup transient time of two cycles for steady-state oscillation while still providing moderate phase noise performance of -110 dBc/Hz at 1 MHz distance from the 400 MHz carrier
Keywords :
UHF integrated circuits; UHF oscillators; VHF oscillators; bipolar analogue integrated circuits; circuit tuning; integrated circuit noise; multivibrators; phase noise; radiofrequency oscillators; relaxation oscillators; variable-frequency oscillators; voltage-controlled oscillators; -5 V; 5 V; 800 kHz to 800 MHz; RF type; UHF; VHF; highspeed complementary bipolar process; linearly adjustable period; modified multivibrator topology; monolithic VCO; phase noise performance; phase-startable oscillator; startup transient time; steady-state oscillation; voltage controlled oscillator; Clamps; Feedback; Frequency; Phase noise; Schottky diodes; Switches; Timing; Topology; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Custom Integrated Circuits Conference, 1994., Proceedings of the IEEE 1994
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-1886-2
DOI :
10.1109/CICC.1994.379744
