ADC using single slope technique
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it is a analog to digital convertor using single slope technique. it is a 4 bit ADC. here i have tried to simulate the 4 bit ADC using single slope technique. here i have used MULTISIM software for simulation.
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Analog to Digitalconvertor for Blood-Glucose Monitoring
ABSTRACT
This paper presents the design of a low-power CMOS current-frequency (I–F) Analog–Digital Converter. The ADC is designed for implantable blood-glucose monitoring. This current frequency ADC uses nArange of input currents to set and compare voltage oscillations against a self-produced reference to resolve 0–32nA with an accuracy of 5-bits at a 225MHz sampling rate. The comparator used is a dynamic latch comparator and the output is fetched from a 5-bit counter. This is designed in 180nm CMOS technology with a supply of 1.8V, it operating voltage taken here is 0.0- 1.8V with power consumption of 12.3nW using Cadence tools.
ANALOG TO DIGITALCONVERTOR FOR BLOOD-GLUCOSE MONITORING
This paper presents the design of a low-power CMOS current-frequency (I–F) Analog–Digital Converter. The ADC is designed for implantable blood-glucose monitoring. This current frequency ADC uses nArange of input currents to set and compare voltage oscillations against a self-produced reference to resolve 0–32nA with an accuracy of 5-bits at a 225MHz sampling rate. The comparator used is a dynamic latch comparator and the output is fetched from a 5-bit counter. This is designed in 180nm CMOS technology with a supply of 1.8V, it operating voltage taken here is 0.0- 1.8V with power consumption of 12.3nW using Cadence tools.
Analog to digital converters, adc
1) The document discusses analog-to-digital converters (ADCs), including their basic function of converting continuous analog signals to discrete digital numbers.
2) It describes several types of ADCs - flash, successive approximation, dual slope, and delta-sigma - along with their relative speeds and costs.
3) The document then focuses on the ATD10B8C ADC present on the MC9S12C32 microcontroller, outlining its key features, registers, and how to set it up and use it to take single-channel or multi-channel conversions.
Similar to ADC using single slope technique (20)
Concept of Digital measurement, block Diagram & study of Voltmeter
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Analog to Digitalconvertor for Blood-Glucose Monitoring
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ANALOG TO DIGITALCONVERTOR FOR BLOOD-GLUCOSE MONITORING
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ADC using single slope technique
- 2. 1. Introduction 2. Circuit diagram 3. Working with design 4. Tool 5. Expected output 6. Applications 7. Advantages and disadvantages 8. References
- 3. In this project, we designed and implemented a analog to digital converter using single slope ADC technique.
- 4. Integrator Sample and hold circuit Comparator Control logic Counter Display
- 6. A counter determines the number of clock pulses that are required before the integrated value of a reference voltage is equal to the sampled input signal. The number of clock pulses is proportional to the actual value of the input The output of the counter is the actual digital represntation of the analog voltage Since the reference is a dc voltage the output of the integrator should start at zero linearly increase with a slope that depends on the gain of the integrator
- 18. The integrator output voltage V1 rises until it reaches Vsampled value. Hence the conversion time tc is equal to:
- 20. Used in high-resolution applications Commonly found in slow-speed, low cost applications Digital multi-meters Panel meters Voltage or current meters Monitoring DC signals in the instrumentation and industrial markets
- 21. Resolution: Able To Achieve 14 Bits Or Higher Very Inexpensive To Produce Low Power Consumption Very Low Offset And Gain Errors Highly Linear Good Noise Performance
- 22. Slow Conversion Typically Less Than A Few Hundred Samples Per Second Sensitive (Direct Dependence Of The Digital Output) To The Values Of: Resistor R1 Capacitor C1 Negative Reference Voltage -VREF
- 23. Baker R. Jacob, CMOS Circuit Design, Layout, and Simulation, 3rd Edition, 2010, John Wiley & Sons http://cmosedu.com/jbaker/courses/ece614/s08/lec26_ece 614.pdf