Correction arithmetic circuit and a signal processor
AssigneeRohm Co., Ltd.
InventorKazuma Mishima
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Abstract
A correction arithmetic circuit disclosed herein includes an offset temperature characteristic correction unit that corrects an offset temperature characteristic of an input signal according to an input signal characteristic at a specific temperature and a temperature characteristic at a specific input signal. A signal processor disclosed herein includes a pulse count number setting circuit that generates a pulse count number setting signal in accordance with an input signal and a pulse generation unit that generates a pulse signal by counting a pulse number of a reference clock signal according to the pulse count number setting signal. The pulse count number setting circuit corrects the pulse count number setting signal so as to cancel a frequency temperature characteristic of the pulse signal.
Claims9
A signal processor comprising:
- a pulse count number setting circuit operable to generate a pulse count number setting signal in accordance with an input signal;
- and
- a pulse generation unit operable to generate a pulse signal by counting a pulse number of a reference clock signal according to the pulse count number setting signal,
- wherein the pulse count number setting circuit is operable to correct the pulse count number setting signal so as to cancel a frequency temperature characteristic of the pulse signal,
- wherein the pulse count number setting circuit includes:
- a reference pulse count number setting unit operable to set a reference pulse count number according to a signal value of the input signal,
- a correction coefficient calculation unit operable to calculate a correction coefficient at a current temperature based on a frequency temperature characteristic of the reference clock signal, and
- a multiplication unit operable to generate the pulse count number setting signal by multiplying the reference pulse count number and the correction coefficient together.
Dependencies are inferred from the claim text.