Title :
Fabrication and characteristics of varactor diode for UHF TV tuner operated within ultra-low tuning voltage
Author :
Kim, H.S. ; Sohn, Y.-S. ; Choi, S.Y.
Abstract :
A varactor diode for a ultra-high-frequency (UHF) TV tuner that can be operated within 5 V of tuning voltage (VT) is presented. The fabricated diode has a shallow junction with a heavily doped p++ region on a steep hyperabrupt n+ region. Depletion capacitance was from 18.2 pF at VT=0.5 V to 2.8 pF at VT=5 V. This enables the diode to tune the UHF full band without a DC-DC converter. The quality factor of the diode was 20 at V T=0.5 V and 470 MHz of tuning frequency (fT)
Keywords :
Q-factor; UHF diodes; capacitance; circuit tuning; television receivers; varactors; 0.5 V; 18.2 to 2.8 pF; 470 MHz; 5 V; UHF TV tuner; depletion capacitance; heavily doped p++ region; quality factor; steep hyperabrupt n+ region; ultrahigh frequency tuner; ultralow tuning voltage; varactor diode;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20070081
