Fully Differential Current Mode Low-pass Biquad with Independent Parameter Tuning
نویسندگان
چکیده
The paper presents a fully differential log-domain low-pass second order filter. The topology was derived, using a LINELIN transformation, from a standard state-variable biquad. The filter allow for orthogonal parameter tuning. Its low-frequency gain (H0), natural pulsation (ω0) and quality factor (Q) can be tuned continuously by varying only DC bias currents. The filter was implemented in a generic BiCMOS 0.18μm process and the simulation results demonstrate the validity of the design.
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