DocumentCode
2822563
Title
Frequency tuning loop for VCOs
Author
Linares-Barranco, B. ; Rodriguez-Vázquez, A. ; Sanchez-Sinencio, Edgar ; Huertas, J.L.
Author_Institution
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fYear
1991
fDate
11-14 Jun 1991
Firstpage
2617
Abstract
A frequency tuning circuit is introduced for VCOs (voltage controlled oscillators) so that the final relationship between oscillating frequency and input control voltage is fixed and independent of nonidealities. This tuning loop is applied to an OTA-C sinusoidal VCO. Such an oscillator has an output frequency-input voltage relationship that depends on temperature, process parameters, and even amplitude of the oscillations. It is shown that, by adding the tuning loop, nonideal dependences will be minimized
Keywords
tuning; variable-frequency oscillators; OTA-C; VFO; frequency tuning circuit; frequency/voltage convertor; input control voltage; oscillating frequency; sinusoidal VCO; tuning loop; voltage controlled oscillators; Circuit optimization; Filters; Frequency conversion; Frequency locked loops; Signal processing; Temperature control; Temperature dependence; Tuning; Voltage control; Voltage-controlled oscillators;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 1991., IEEE International Sympoisum on
Print_ISBN
0-7803-0050-5
Type
conf
DOI
10.1109/ISCAS.1991.176082
Filename
176082
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