A random noise generator with selectable bandwidth and RMS voltage regulation is described.
Random noise generator
Filter, audio and RF communication testing often requires a random noise source. The circuit in Figure 444.1 provides an RMS amplitude regulated noise source with selectable bandwidth. The RMS output is 300mV with a 1kHz to 5MHz bandwidth selected in decade ranges.
The A1 amplifier, biased from the LT1004 reference, provides optimum drive for D1, the noise ...