Experiments Included:

  • Study of CVSD Encoding
  • Study of CVSD Encoding and Decoding
  • Study of CVSD Encoding and Decoding with Microphone

The Continuously Variable Slope Delta Modulator (CVSD) is a simple alternative to more complex conventional conversion technique, like PCM, in systems requiring digital communication of analog signals. The CVSD A-D conversion is well suited to the requirements of digital communications and is an economically efficient means of digitizing analog inputs for transmission. This trainer explores the functionality of CVSD Encoding / Decoding technique. All required sections are provided on board like, clock generator, audio generator, microphone interface, low pass filter, audio output and ac amplifier.


  • Power Supply Included
  • Required Circuits Tested
  • Each Section Clearly Marked for Input and Output
  • Each Section Works as an Independent Unit
  • Built-in CVSD Encoder/Decoder
  • Built-In Clock Generators
  • Built-In AC Amplifier
  • Each Section Clearly Marked for Easy Understanding

Technical Features:

  • Clock Generator: 8K, 16K, 32K, 64K
  • Audio Signal generator: adjustable frequency & gain
  • Encoder: CVSD
  • Decoder: CVSD
  • Low Pass Filter: 5th Order Butterworth Filter with 3.4KHz cut off
  • Amplifier: AC amplifier with variable gain
  • Audio Amplifier: Monolithic amplifier with speaker
  • Voice interface: microphone