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This paper presents an ultrafast CMOS flash A/D converter design and performance. Although the featured A/D converter is designed in CMOS, the performance is compatible to that of GaAs technology currently available. To achieve high-speed in CMOS, the featured A/D converter utilizes the Threshold Inverter Quantization (TIQ) technique. A 6-bit TIQ based(More)
High-frequency ultrasound array transducers using piezoelectric thin films on larger structures are being developed for high-resolution imaging systems. The increase in resolution is achieved by a simultaneous increase in operating frequency (30 MHz to about 1 GHz) and close coupling of the electronic circuitry. Two different processing methods were(More)
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.(More)
This paper presents a comparator generation and selection method to reduce the linearity errors-DNL and INL-for a CMOS flash analog-to-digital converter (ADC) based on threshold inverter quantization (TIQ) technique. The TIQ flash ADC requires 2 n , 1 com-parators like conventional flash ADCs. However, each comparator in the TIQ flash ADC has different(More)
A novel design for a chip-scale miniature oven-controlled crystal oscillator (OCXO) is presented. In this design, all the main components of an OCXO--consisting of an oscillator, a temperature sensor, a heater, and temperature-control circuitry--are integrated on a single CMOS chip. The OCXO package size can be reduced significantly with this design,(More)
The thermometer code-to-binary code encoder has become the bottleneck of the ultra-high speed flash ADCs. In this paper, the authors presented the fat tree thermometer code-to-binary code encoder that is highly suitable for the ultra-high speed flash ADCs. The simulation and the implementation results show that the fat tree encoder outperforms the commonly(More)
The design methods and the automation of the compara-tor circuit layout generation for a flash A/D converter are presented in this paper. The threshold inverter quantization (TIQ) based A/D converters require 2 n , 1 comparators, each one different from all others. Optimal design method of the TIQ comparator presented in this paper significantly improves(More)