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US 6,445,219 B1Granted
Method and circuit configuration for converting a frequency signal to a DC voltage
AssigneeSiemens Aktiengesellschaft
InventorRalph Oppelt
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AssigneeSiemens Aktiengesellschaft
InventorRalph Oppelt
Estimating the term…
In the process for converting a frequency signal to a DC voltage according to the invention a first and a second output voltage signal (UA1, UA2) are generated from the frequency signal. Each of the output voltage signals is a sequence of rectangular pulses the pulse sequence frequency of which is equal to a frequency f of the frequency signal. These are converted with a first and a second lowpass filter to a first DC voltage signal and a second DC voltage signal, respectively, with the second DC voltage signal being used to influence the pulse width T0 of the rectangular pulses of at least the first output voltage signal. This makes it possible to build a simple frequency-to-voltage converter using cost-effective standard monoflops in which a largely linear correlation between frequency f of the frequency signal and the magnitude of the first DC voltage signal is realized in a simple manner.
A method of converting a frequency signal to a DC voltage signal, which comprises:
A circuit configuration for converting a frequency signal to a DC voltage signal, comprising:
A circuit configuration for converting a frequency signal to a DC voltage signal, comprising:
Dependencies are inferred from the claim text.