H - Electricity – 03 – F
Patent
H - Electricity
03
F
H03F 3/00 (2006.01) H03B 5/20 (2006.01) H03F 1/32 (2006.01)
Patent
CA 2210547
A transconductance amplifier for use in a low noise, microwave voltage controlled oscillator. The transconductance amplifier incorporates a linear amplifier having ratioed transistors to provide linearized gain. A tuning arrangement combines in-phase and out of phase currents in an inverse ratio to provide a constant D.C. current sum. The tuning circuit has been arranged to operate without a cascode stage such that the power supply voltage requirement is reduced from 5.0 volts to 3.3 volts.
Amplificateur de transconductance pour utilisation dans un oscillateur pour hyperfréquences à tension variable (VCO). L'amplificateur de transconductance incorpore un amplificateur linéaire à transistors divisés pour linéarisation du gain. Un accord combine les courant en phase et les courants déphasés en rapport inverse pour assurer une somme constante de courant continu. Le circuit d'accord a été configuré pour fonctionner sans structure cascode, de telle sorte que la tension d'alimentation peut être réduite de 5,0 volts à 3,3 volts.
de Wilton Angela C.
Nortel Networks Limited
Northern Telecom Limited
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