The minimum number of comparators required to build an eight-bit flash ADC is
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- 8
- 255
- 256
- 64
The Correct Option is B
Solution and Explanation
Top Questions on ADCs and DACs: Principles
The \( Z \)-parameter matrix of a two-port network relates the port voltages and port currents as follows: \[ \begin{bmatrix} V_1 \\ V_2 \end{bmatrix} = Z \begin{bmatrix} I_1 \\ I_2 \end{bmatrix} \] The \( Z \)-parameter matrix (with each entry in Ohms) of the network shown below is _________.
- GATE EC - 2025
- Analog and Digital Electronics
- ADCs and DACs: Principles
Let \( G(s) = \frac{1}{10s^2} \) be the transfer function of a second-order system. A controller \( M(s) \) is connected to the system \( G(s) \) in the configuration shown below.
Consider the following statements.- (i) There exists no controller of the form \( M(s) = \frac{K_I}{s} \), where \( K_I \) is a positive real number, such that the closed-loop system is stable.
- (ii) There exists at least one controller of the form \( M(s) = K_p + sK_D \), where \( K_p \) and \( K_D \) are positive real numbers, such that the closed-loop system is stable.
Which one of the following options is correct?
- GATE EC - 2025
- Analog and Digital Electronics
- ADCs and DACs: Principles
A 4-bit weighted-resistor DAC with inputs \( b_3, b_2, b_1, \) and \( b_0 \) (MSB to LSB) is designed using an ideal opamp, as shown below. The switches are closed when the corresponding input bits are logic ‘1’ and open otherwise. When the input \( b_3b_2b_1b_0 \) changes from 1110 to 1101, the magnitude of the change in the output voltage \( V_o \) (in mV, rounded off to the nearest integer) is _________.
- GATE EC - 2025
- Analog and Digital Electronics
- ADCs and DACs: Principles
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