Consider a four bit D to A converter. The analog value corresponding to digital signals of values 0000 and 0001 are 0 V and 0.0625 V respectively. The analog value (in Volts) corresponding to the digital signal 1111 is _____.

Question

Accepted Answer

4-bit A/D converter
For input 0000 → output Voltage = 0 V
For input 0001 → output Voltage = 0.0625 V
[latex]V_{0}[/latex]= K(input in decimal)
0.0625 = K(1) ⇒ K = 0.0625
For input 1111 = [latex](15)_{10}[/latex]

[latex]V_{0}[/latex]= 0.0625 × 15 = 0.9375
Hence, the correct Answer is (0.93 to 0.94).

Common Data for Questions 1 and 2
In the following circuit, the comparator output is logic '1' if [latex]V_{1}>V_{2}[/latex] and is logic ‘0’ otherwise. The D/A conversion is done as per the relation

[latex]V_{D A C}=\sum_{n=0}^{3} 2^{n-1} b_{n} ext { volts, where } b_{3} ext { (MSB), } b_{2}, b_{1} ext { and } b_{0}[/latex]

(LSB) are the counter outputs.
The counter starts from the clear state

Question 8.2.2: Consider a four bit D to A converter. The analog value corre...

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