DESIGN OF A BIPOLAR 10-MHZ PROGRAMMABLE CONTINUOUS-TIME 0.05-DEGREES EQUIRIPPLE LINEAR-PHASE FILTER

A bipolar seventh-order 0.05-degrees equiripple linear phase (constant group delay) transconductance-capacitor (g(m)-C) low-pass filter with a cutoff frequency (f(c)) tunable between 2 and 10 MHz is presented. Programmable equalization up to 9 dB at f(c) is also provided. Total harmonic distortion at 2 V(p-p) is less than 1%, with a dynamic range equal to 49 dB. Nominal power consumption from a single 5-V supply is 135 mW. The circuit also has a low-power mode (< 0.5-mW dissipation).