Low Voltage Low Frequency Continuous Time CMOS Antialiasing Filters

Antialiasing filter for NSDM codec

“…When implementing such a filter in CMOS technology, especially for SoC architecture, the key issue is a practical realization of huge time constants. To keep the reasonable chip area it is not possible to use capacitors of a few tens of picofarads [9,10]. To achieve appropriate time constant is necessary to use resistors that's value may achieve megaomhs, so practical CMOS implementation is a quite troublesome.…”

“…Analog CMOS circuits usually require higher supply voltage than digital ones, since they are based on different modifications of symmetric long tail pair [10]. This building block is extremely popular thank to its structure symmetry and versatility: it is well suited for single-ended as well as differential input and output, common mode and power supply rejection.…”

“…It occurs, because the supply chain includes stack of three or more transistors and between the supply rails there are at least three threshold. Objective this work is continuation studies regarding construction antialiasing filter exploit as resistors adequate large transmission gates [10].…”

Negative Resistance Active Resistor With Improved Linearity and Frequency Response

“…[4][5][6][7] Because of the quadratic characteristic of the MOS transistor, some linearization techniques were developed in order to minimize the nonlinear terms from the current-voltage characteristic of the active resistor. Usually, the linearization of the I-V characteristic is obtained by a first-order analysis.…”