Abstract
In this research a new highly versatile analog building block (ABB), the voltage differencing dual X current conveyor (VD-DXCC), is proposed. It is employed to synthesize a versatile dual mode biquadratic filter. The proposed filter uses canonical number of passive elements and has inbuilt tunability feature. In addition, the proposed filter can work as multi input single output (MISO) and single input multi output (SIMO) filter in current mode (CM) of operation. Furthermore, the quality factor and pole frequency of the filter can be set independently. The non-ideal gain analysis and sensitivity analysis of the filters is also carried out to study the effect of process variations and process spread on the filter response. The proposed designs are validated using 0.18um Silterra Malaysia process design kit (PDK) in Cadence Virtuoso design software. The parasitic extraction is carried out using Calibre tool from Mentor Graphics. The complete layout of the VD-DXCC is made and post layout simulation results are given for each design. The post layout results are in close agreement with the theoretical analysis.
Highlights
Analog circuits play a vital role in all electronic systems
The digital signal processors require the extra analog to digital converter (ADC) and digital to analog converter (DAC) together with interfacing circuits this increases the power and area requirement of digital signal processing
The current mode analog active blocks are widely utilized by the researchers in designing analog filters due their advantages over voltage mode circuits [2,3]
Summary
Analog circuits play a vital role in all electronic systems. The analog circuits are used for interfacing analog world with the digital systems or as standalone high speed signal conditioning systems. The current mode analog active blocks are widely utilized by the researchers in designing analog filters due their advantages over voltage mode circuits [2,3]. Filters are a critical part of any electronics system They are employed in data acquisition systems, communication equipment, phase shifters, oscillator designs and bio-medical devices etc. Portable and network connected medical devices for real time monitoring and diagnosis of diseases will be vital in detecting diseases for future medical observation system To develop such a system low power and low noise analog circuits such as amplifiers and filters are required for physiological signal acquisition and signal processing. In this research a highly versatile ABB the VD-DXCC is developed and utilized in design of a MISO dual mode universal filter and SIMO CM filter. Mode) validated using 0.18μm PDK from Silterra Malaysia in Cadence to verify the theoretical predictions
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