## Weighted-resistor converter, Electrical Engineering

Assignment Help:

Q. WEIGHTED-RESISTOR CONVERTER?

Figure shows a 4-bit weighted-resistor D/A converter which includes a reference voltage source, a set of four electronically controlled switches, a set of four binary-weighted precision resistors, and an op amp. Each binary bit of digital input code controls its own switch. The switch closes with a bit value of 1, and the switch stays open with binary 0. The resistor connected to the most significant bit (MSB), b0, has a value of R; b1 is connected to 2R, b2 to 4R, and b3 to 8R.

Thus, each low-order bit is connected to a resistor that is higher by a factor of 2. For a 4-bit D/A converter, the binary input range is from 0000 to 1111.

An important design parameter of a D/A converter is the resolution, which is the smallest output voltage change, V , which for an n-bit D/A converter is given by

The range of resistor values becomes impractical for binary words longer than 4 bits. Also, the dynamic range of the op amp limits the selection of resistance values. To overcome these limitations, the R-2R ladder D/A converter is developed.

#### Branch current method, if a resistor present in the middle of two branches ...

if a resistor present in the middle of two branches in such a way that their polarities coincide then how do we choose the polarity of that resistor

#### Sketch the inductor voltage and stored energy, (a) Consider a 5-µH inductor...

(a) Consider a 5-µH inductor to which a current source i(t) is attached, as shown in Figure (b). Sketch the inductor voltage and stored energy as a function of time. (b) Let a v

#### Determine voltage and current gain, Q. Determine voltage and current gains ...

Q. Determine voltage and current gains for the CE BJT amplifier shown in Figure with the following parameters: R 1 = 30,000, R 2 = 9000 ,R C = 750 ,R E = 250 , R L = 1000 

#### Obtain the complete solution for the voltage, Consider the circuit of Figur...

Consider the circuit of Figure and obtain the complete solution for the voltage v C (t) across the 5-F capacitor and the voltage vx(t) across the 5- resistor.

#### Find an expression for the instantaneous force, Q. Let the solenoid carry a...

Q. Let the solenoid carry an alternating current of 10 A (rms) at 60 Hz instead of the direct current. Find an expression for the instantaneous force.

#### Bode plot, Hai.. i have been given a open loop transfer function to draw a...

Hai.. i have been given a open loop transfer function to draw a bode plot with a particular K value and they asked me to find the value of K for which the phase margin becomes 45d

#### Dtl and ttl logic circuits, Q. DTL AND TTL LOGIC CIRCUITs? Bipolar tran...

Q. DTL AND TTL LOGIC CIRCUITs? Bipolar transistorswere the first solid-state switching devices commonly used to implement digital logic circuits in the 1950s and 1960s. These c

#### Control, Ask The goal of this project is to model a system and to design a ...

Ask The goal of this project is to model a system and to design a controller for the system so that the closed-loop system performs satisfactorily. We want to accurately positio

#### Show twos complement multiplication, 2's Complement Multiplication Two'...

2's Complement Multiplication Two's complement multiplication follows the similar rules as binary multiplication. For illustration, (-4) × 4 = (-16)              1111

#### Basic specifications of a ujt, The very basic specifications of a UJT are: ...

The very basic specifications of a UJT are: Vbb(max) - The maximum interbase voltage that can be applied to the UJT (b) Rbb-the interbase resistance of the UJT (c) n - The