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Understanding R/2R Ladder Networks in Voltage Scaling and Digital-to-Analog Conversion

This lecture delves into the R/2R ladder network, a fundamental circuit used for scaling down voltages in digital-to-analog conversion. The essence of the R/2R network lies in its unique resistor relationship, where one set has resistors of double the value of the other. We simulate digital inputs through switches connected to ground (0V) or a positive voltage (V) to analyze the voltage levels based on switch configurations. Explore the applications and analysis of R/2R ladder networks in electronics and learn how they achieve precise voltage scaling for digital signals.

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Understanding R/2R Ladder Networks in Voltage Scaling and Digital-to-Analog Conversion

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  1. Previous Lecture 12 • Voltage Dividers with Resistive loads

  2. Lecture 13 SERIES-PARALLEL CIRCUITS • Ladder Networks

  3. Lecture 13 The R/2R Ladder Network A basic R/2R ladder network is shown in following Figure. The name comes from the relationship of the resistor values. R represents a common value, and one set of resistors has twice the value of the others. The R/2R ladder network is commonly used to scale down voltages to certain weighted values for digital-to-analog conversion.

  4. The switches used in this illustration simulate the digital (two-level) inputs. One switch position is connected to ground (0 V), and the other position is connected to a positive voltage (V).

  5. Analysis of R/2R Ladder NetworkSwitch SW4 is at the V position and the others are at ground

  6. Switch SW3 is at the V position and the others are at ground

  7. Switch SW2 is at the V position and the others are at ground

  8. Switch SW1 is at the V position and the others are at ground

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