Design of Low Power High Speed 4-Bit TIQ Based CMOS Flash ADC
The analog-to-digital converter (ADC) is an essential part of system-on-chip (SoC) products because it bridges the gap between the analog physical world and the digital logical world. In the digital domain, low power and low voltage requirements are becoming more important issues as the channel length of MOSFET shrinks below 0.25 sub-micron values. SoC trends force ADCs to be integrated on the chip with other digital circuits. These trends present new challenges in ADC circuit design. This paper investigates high speed, low power, and low voltage CMOS flash ADCs for SoC applications.
The proposed ADC utilizes the Threshold Inverter Quantization (TIQ) technique that uses two cascaded CMOS inverters as a comparator. The TIQ technique proposed here has been developed for better implementation in SoC applications. The preliminary results show that the TIQ flash ADC achieves high speed, small size, low power consumption, and low voltage operation compared to other ADCs.
KeywordsPerformance Chart Standard CMOS Technology Inter Modulation Distortion Thermometer Code Power Consumption Level
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