CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Design of Low Phase-Noise Oscillators and Wideband VCOs in InGaP HBT Technology

Dan Kuylenstierna (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik ; GigaHertz Centrum) ; Sz-Hau Lai (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik ; GigaHertz Centrum) ; M. Q. Bao ; Herbert Zirath (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik ; GigaHertz Centrum)
Ieee Transactions on Microwave Theory and Techniques (0018-9480). Vol. 60 (2012), 11, p. 3420-3430.
[Artikel, övrig vetenskaplig]

A method for design of low phase-noise balanced-Colpitts (BC) fixed-frequency oscillators (FFOs) and wideband voltage-controlled oscillators (VCOs) is presented. Analytical expressions describe how to design an oscillator for best phase noise, given a limited Q factor and a certain active device. The theory needs only two free parameters: the impedance (Z(c)) level and tapping ratio (n) of the resonator. It is described how to chose Z(C) and n for low phase noise and large tuning range, respectively. The design method is verified with a low phase-noise FFO and a wideband VCO, both designed in InGaP HBT technology. The BC FFO presents a phase noise of -112 dBc/Hz at 100-kHz offset from a 9.2-GHz carrier. The wideband VCO implemented in the same technology presents a minimum phase noise of -106 dBc/Hz at 100-kHz offset from a 9-GHz carrier. Over the frequency range of 8.4-9.7 GHz, the phase noise is better than -102 dBc/Hz and the output power is 7 +/- 0.5 dBm. The wide tuning range, constant output power, and relatively constant and low phase noise are achieved due to double pairs of tuning varactors, one between emitters and one between collectors. To the authors' best knowledge, this type of double-tuned BC VCO topology has not been previously published.

Nyckelord: Balanced Colpitts (BC), double tuned, oscillator, phase noise, voltage-controlled oscillator (VCO), colpitts vco, tuning range, model



Denna post skapades 2013-01-03. Senast ändrad 2015-08-10.
CPL Pubid: 168980

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik
GigaHertz Centrum

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur

Relaterade publikationer

Denna publikation ingår i:


Oscillator design in III-V technologies