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FIG. 7. Noise and Resistance with vs bias in a carbon wax composite. The bias exponent in the linear regime is 1.85. It can be clearly seen that the onset of non-linearity of resistance is accompanied with decrease of normalized noise.

Figure 7 Noise and Resistance with vs bias in a carbon wax composite. The bias exponent in the linear regime is 1.85. It can be clearly seen that the onset of non-linearity of resistance is accompanied with decrease of normalized noise.

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FIG. 2. Schematic of modules in different arrangements used for high and low current cases. a) High R, module is for sup- plying low current while b) Low R module is for supplying high current. FIG. 1. Schematic of the basic module of the low noise con- stant current source.
FIG. 2. Schematic of modules in different arrangements used for high and low current cases. a) High R, module is for sup- plying low current while b) Low R module is for supplying high current. FIG. 1. Schematic of the basic module of the low noise con- stant current source.
FIG. 3. Schematic of the low noise constant current source consisting of four identical units as described in fig. 2. For detail see text.
FIG. 3. Schematic of the low noise constant current source consisting of four identical units as described in fig. 2. For detail see text.
TABLE I. Comparison of current noise of a commercial source Keithley 6430 (noise calculated from data sheet) and the present source for different ranges of current.
TABLE I. Comparison of current noise of a commercial source Keithley 6430 (noise calculated from data sheet) and the present source for different ranges of current.
FIG. 5. Current noise S4 vs. frequency for a 150 2 and 10 KQ metal film resistor for various bias currents are shown. The inset shows noise power (averaged over 9-18 Hz octave) with current. FIG. 4. Current noise S,4 vs. frequency for 3 different metal film resistors as load at one specific current of 100A is shown. The trend of noise with load resistance follows eqn. [5
FIG. 5. Current noise S4 vs. frequency for a 150 2 and 10 KQ metal film resistor for various bias currents are shown. The inset shows noise power (averaged over 9-18 Hz octave) with current. FIG. 4. Current noise S,4 vs. frequency for 3 different metal film resistors as load at one specific current of 100A is shown. The trend of noise with load resistance follows eqn. [5
FIG. 6. PSD (averaged over 9-18 Hz) of a NSMO thin film with voltage at a temperature of 79 K. V? dependence of noise with bias is observed. A typical 1/f noise spectrum for the film is shown in the inset.
FIG. 6. PSD (averaged over 9-18 Hz) of a NSMO thin film with voltage at a temperature of 79 K. V? dependence of noise with bias is observed. A typical 1/f noise spectrum for the film is shown in the inset.
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Engineering1/f NoiseNoise Measurement
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