For voltage-controlled high-precision devices, such as crystal oscillators, the noise and stability of the control voltage affect directly to the performance of the device.
For product inspection and evaluation of such voltage-controlled devices, it is important to use a low-noise and highly stable voltage source.
Measured how much the noise of control voltage source affects the output with the measurement system shown in Figure 3.
As shown in Figure 4, when using our low-noise power supply LP5394, the variation of output frequency is lower than half comparing when using a general linear regulator type power supply.
Thus, even if the device is same, the quality of the power supply causes a difference in the variation of output frequency.
Therefore, it is necessary to pay attention to the quality of the power supply when evaluating the devices which requires voltage-control.
Related keywords : Low Noise DC Voltage Source