Design of high dynamic range fully integratable translinear filters

This paper addresses the non-linear noise and dynamic-range properties of b ipolar and MOS (both in weak and in strong inversion) translinear integrato rs, following a systematic top-down approach. Several design principles to achieve an optimal dynamic range are derived. A qualitative comparison of a bipolar or weak-inversion class-AB translinear integrator and the well-kno wn linear g(m) - C integrator reveals that the former is an interesting can didate, especially for low-voltage and/or low-power operation. As an exampl e, a +/- 1.65-V bipolar translinear integrator is presented that makes dyna mic-range optimization possible by adjusting just one bias current. Its app lication in an audio filter yields a 63-dB dynamic range and a virtual dyna mic range of 76 dB, while the current consumption can be as low as 310 nA.