A Wide Band Oscillator Design Based on Bi-CMOS Active Load Differential Amplifier

Author

Tsai, Cher-Shiung ; Lin, Ming-Hsin ; Chang, Chien-Hua ; Jiang, Shu-Yin ; Guo, Ming-Yuan ; Gan, Kwang-Jow ; Liang, Dong-Shong ; Chang, Pei-Hua ; Chen, Yaw-Hwang

Author_Institution

Kun Shan Univ., Tainan

fYear

2007

fDate

20-22 Dec. 2007

Firstpage

773

Lastpage

776

Abstract

In this paper, we present a VHF and UHF bands oscillator which mainly composed of a Bi- CMOS active load differential amplifier (Diff. amp). We use H-spice and ADS to verify that the active load differential amplifier oscillator output frequency is 817.1 MHz at 3.3 volts power supply under CIC 0.35 um-GeSi process. We also use discrete devices on bread board to prove the circuit is an oscillator circuit. Those experiments show such an oscillator can work stably from 2.7 to 6.0 volts. Their output frequency will be 128.7 MHz, 176.4 MHz under 2.7 volts and 6.0 volts respectively. We use FFT (Fast Fourier Transform) diagram to analyse these oscillators and shows SNR (signal-to-noise ratio) values. Finally, those experimental results reveal that the oscillator is a nice voltage controlled oscillator (VCO) and also have good SNR characteristics.

Keywords

BiCMOS integrated circuits; Ge-Si alloys; UHF integrated circuits; UHF oscillators; VHF oscillators; differential amplifiers; fast Fourier transforms; voltage-controlled oscillators; Bi-CMOS active load differential amplifier; FFT diagram; GeSi; SNR characteristics; UHF oscillator; VCO; VHF oscillator; frequency 128.7 MHz; frequency 176.4 MHz; frequency 817.1 MHz; size 0.35 mum; voltage 2.7 V to 6.0 V; voltage controlled oscillator; wide-band oscillator design; Circuit simulation; Design engineering; Differential amplifiers; Frequency; Gallium nitride; Inverters; MOS devices; Phase noise; Switches; Voltage-controlled oscillators; Diff Amp; FFT; SNR; VCO;

fLanguage

English

Publisher

ieee

Conference_Titel

Electron Devices and Solid-State Circuits, 2007. EDSSC 2007. IEEE Conference on

Conference_Location

Tainan

Print_ISBN

978-1-4244-0637-1

Electronic_ISBN

978-1-4244-0637-1

Type

conf

DOI

10.1109/EDSSC.2007.4450240

Filename

4450240