A linearly-tunable OTA-C sinusoidal oscillator for low-voltage applications


Autoria(s): De Lima, Jader A.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

27/05/2014

27/05/2014

01/01/2002

Resumo

A low-voltage, low-power OTA-C sinusoidal oscillator based on a triode-MOSFET transconductor is here discussed. The classical quadrature model is employed and the transconductor inherent nonlinear characteristic with input voltage is used as the amplitude-stabilization element. An external bias VTUNE linearly adjusts the oscillation frequency. According to a standard 0.8μm CMOS n-well process, a prototype was integrated, with an effective area of 0.28mm2. Experimental data validate the theoretical analysis. For a single 1.8V-supply and 100mV≤VTUNE≤250mV, the oscillation frequency fo ranges from 0.50MHz to 1.125MHz, with a nearly constant gain KVCO=4.16KHz/mV. Maximum output amplitude is 374mVpp @1.12MHz. THD is -41dB @321mVpp. Maximum average consumption is 355μW.

Identificador

http://dx.doi.org/10.1109/ISCAS.2002.1011011

Proceedings - IEEE International Symposium on Circuits and Systems, v. 2.

0271-4310

http://hdl.handle.net/11449/66771

10.1109/ISCAS.2002.1011011

WOS:000186280700104

2-s2.0-0036287115

Idioma(s)

eng

Relação

Proceedings - IEEE International Symposium on Circuits and Systems

Direitos

closedAccess

Palavras-Chave #CMOS integrated circuits #Computer simulation #Electric network topology #Integrated circuit layout #MOSFET devices #Numerical analysis #Quadrature amplitude modulation #Transconductance #Transfer functions #Amplitude stabilization element #Circuit complexity #Finite source resistance #Maximum output amplitude #Oscillation frequency #Variable frequency oscillators
Tipo

info:eu-repo/semantics/conferencePaper