A third-order Chebyshev low-pass filter with automatic tuning based on new BiCMOS low-voltage triode transconductors for applications in the very-high-frequency (VHF) range is presented. Simulation results of the filter and the automatic tuning circuitry are described. The complete system operates with supply voltages of ±1.5 V. The filter achieves a 42.8 MHz cutoff frequency. The filter total harmonic distortion (THD) stays lower than 1% for an input signal up to 1.061 V pp at 8 MHz frequency. The dynamic range of the filter is 60 dB
Published in:
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
(Volume:2
)
Date of Conference: 2000