How does ramp ADC work?
The ramp ADC uses a simple counter. A slightly better ADC is the tracking converter. Its logic is a bidirectional (up/down) counter. As vx changes, the comparator output causes the counter to count up if the DAC input d is low and down if it is high.
What is a counter type ADC?
A counter type ADC produces a digital output, which is approximately equal to the analog input by using counter operation internally. This output of the counter is applied as an input of DAC. DAC converts the received binary (digital) input, which is the output of counter, into an analog output.
What is counter ramp?
The counter type ADC analog to digital converter is a simple ADC also known as a staircase or ramp analog to digital converter. It, as its name suggests, uses a binary counter for the conversion of analog signals.
Which type of ADC uses ramp generating circuit?
A ramp-type analog-to-digital converter (also known as ramp-compare or time-base ADC) comprises five basic circuits: a ramp generator, a counter, a comparator circuit, a clock pulse generator, and a gate circuit, which are simultaneously operated to provide analog-to-digital conversion.
How does ADC dual slope work?
In dual slope type ADC, the integrator generates two different ramps, one with the known analog input voltage VA and another with a known reference voltage –Vref. Hence it is called a s dual slope A to D converter.
How is ADC resolution calculated?
ADC has a resolution of one part in 4,096, where 212 = 4,096. Thus, a 12-bit ADC with a maximum input of 10 VDC can resolve the measurement into 10 VDC/4096 = 0.00244 VDC = 2.44 mV. Similarly, for the same 0 to 10 VDC range, a 16-bit ADC resolution is 10/216 = 10/65,536 = 0.153 mV.
What are the types of counters?
Types of Counters
- Asynchronous Counters.
- Synchronous Counters.
- Asynchronous Decade Counters.
- Synchronous Decade Counters.
- Asynchronous Up-Down Counters.
- Synchronous Up-Down Counters.
What is ADC and different types of ADC?
There are really five major types of ADCs in use today:
- Successive Approximation (SAR) ADC.
- Delta-sigma (ΔΣ) ADC.
- Dual Slope ADC.
- Pipelined ADC.
- Flash ADC.
What is dual ramp ADC?
What is the limitation of counter type of ADC?
Counter type ADC Disadvantages Speed is less, since each time the counter has to begin from ZERO. There may be conflicts if the next i/p is sampled before completion of one process.
What is the conversion time of counter type ADC?
Conversion time of Counter type ADC Here the maximum conversion of high input voltage for a N bit ADC is the clock pulses required to the counter to count its maximum count value. So the maximum conversion of Counter type ADC is = (2N-1) T, where, T is the time period of clock pulse. If N=2 bit then the Tmax = 3T.