A log-domain current-mode quadrature sinusoidal
oscillator based on all-pass filter and lossless integrator is
presented. The oscillator is realized by a first-order
differential equation for obtaining all pass filter and lossless
integrator. The proposed oscillator can be electronically tuned
by adjusting bias currents. The proposed oscillator contains 18
NPN transistors, 2 grounded capacitors and 11 bias currents
for achieving low-power and fast response. A validated BJT
model is used in SPICE simulation operated from a single
power supply as low as 2.5V. The oscillation frequency is
controlled over four decades of frequency. The total harmonic
distortion of signal output is obtained around 0.55%. The
oscillation frequency can be operated more than 100MHz
which enables fully integrated in telecommunication systems
and suitable for high-frequency applications. SPICE
simulation results are included.