| 摘要 |
PURPOSE:To increase the control range of a sound volume control circuit for the single/continuous volume. CONSTITUTION:The resistance value of a 1st resistor R1 is equal to the added value of the 2nd and 3rd resistors R2 and R3. At the same time, vo=VR.io (constant) is satisfied. Thus the sound volume (Vo) is directly proportional to the resistance change of the single/continuous volume (VR) 24. In such a way, a sound volume control range is increased with a sound volume control circuit. |
