| 摘要 |
A device for rapid digital/analog conversion of pulse width modulated signals, includes a first changeover switch and an inverting integrator having a resistor, a first capacitor, a second changeover switch, a first operational amplifier, and an integrator output. A non-inverting input of the operational amplifier is connected to a reference voltage. An inverting input is selectively connected to an input through first switch connections and the resistor and to an amplifier output through first switch connections. The first capacitor is disposed between the inverting input and the amplifier output. The second changeover switch selectively connects the integrator output to a second capacitor and the integrator output to a third capacitor. A third changeover switch selectively connects a non-inverting input of a buffer amplifier to the second and third capacitors. The buffer amplifier output is the device output. A monostable multivibrator selectively switches the first changeover switch and is triggered by an input signal. A frequency divider triggers the second and third changeover switches and is triggered by the input signal.
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