PERTEMAUAN 10

1
PERTEMAUAN 10 11

• AC Bridges dan APLIKASINYA

2
Maxwell Bridge

• The Maxwell bridge measures an unknown inductance
  in terms of a known capacitance.
• The maxwell bridge is limited to the measurement
  of medium-Q coils (1ltQlt10).

3
Hay Bridge

• The Hay circuit is more convenient for measuring
  high-Q coils
• Hay bridge for inductance measurements
  ---------------------?
• Impedance triangles illustrate inductive and
  capacitive phase angles --------------------------
  ------?
• for Qgt10

4
Schering Bridge

• The Schering bridge, one of the most important
  bridges, is used extensively for the measurement
  of capacitors.
• Schering bridge for measurement of capacitance
  --------------------?
• Dissipation factor

5
Unbalance Conditions
6

• Bridge balancing problem
• (a) unbalanced condition
• (b) bridge balance is restored by adding a
  resistor to arm 1 (maxwell configuration)
• (c) Alternative method of restoring bridge
  balance, by adding a capacitor to arm 3

7
Wien Bridge

• Applications
• Frequency measureent
• Notch filter
• Frequency-determining element
• Frequency measurement with the Wien bridge
  -----------------------?

8
Wagner Ground Connection

• The wagner ground connection eliminates the
  effect of stray capacitances across the detector

9
Universal Impedance Bridge

• Universal impedance bridge

10

• Bridge configurations of the universal impedance
  bridge