Process and device for frequency to voltage conversion.

摘要

The object of the invention is to describe a method for frequency-to-voltage conversion which avoids the imbalance in the characteristic which occurs in state-of-the-art converters. The object is solved by shifting the frequency signal which is applied to an input (19) of the frequency-to-voltage converter (26) with a reference frequency (fr) into a higher frequency signal. The phase of this frequency signal is compared with the phase of a signal which is obtained via a balanced voltage-to-frequency converter (26) from the signal at the output (28) of the frequency-to-voltage converter and is also shifted into a higher frequency signal. The phase of the comparison signal is then compared with the phase of the reference frequency. The figure shows a block diagram of a frequency-to-voltage converter.