Waveform generation method, radar device, and oscillator for radar device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorShigeho Inatsune
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Abstract
It is possible to generate D/A conversion voltage in which an error generated by numeric irregularities of a D/A conversion element such as resistor constituting a D/A converter 11 is corrected. A waveform generation method characterized in that input data into a D/A converter 11 are provided to the D/A converter in order at a timing at which a voltage of a desired waveform which has D/A conversion data indicating a conversion amount of the input data obtained by varying the input data by a minimum conversion unit or a unit obtained by multiplying the minimum conversion unit by an integer, and which varies with time series, becomes substantially equal to a D/A-converted voltage, whereby the D/A-converted voltage is generated in accordance with the desired waveform.
Claims5
Radar device comprising:
- a storage device for storing a timing at which a D/A-converted voltage in D/A conversion data obtained by varying input data into a D/A converter by a conversion unit level based on the D/A-converted voltage and a voltage of a desired waveform varying with time series become substantially equal to each other;
- a waveform storage device for registering the input data at the timing;
- a controller for giving the input data to the D/A converter at the timing;
- and
- a variable oscillator for varying an oscillation frequency in accordance with a variation of the D/A-converted voltage.
An oscillator for radar device comprising:
- a time storage device for storing a timing in correspondence with input data in a D/A-converter at which a D/A conversion voltage in D/A conversion data obtained by varying the input data by a conversion unit level based on the D/A-converted voltage of a desired waveform varying with time series become substantially equal to each other;
- a controller for providing the input data to the D/A-converter at the timing;
- and
- a variable oscillator for varying an oscillation frequency in accordance with the variation of the D/A conversion voltage.
A waveform generation method comprising:
- feeding input data to a D/A-converter, wherein
- measuring of the input data is achieved as unit levels, and
- converting each unit level, via the D/A-converter, into a related output conversion voltage;
- determining an order of timing based on the output conversion voltage;
- associating the order of timing with a predetermined desired D/A input data;
- and
- adjusting the order of timing in accordance with the output conversion voltage to produce a desired waveform corresponding to the desired D/A input data.
Dependencies are inferred from the claim text.