Temperature correction device and voltage control oscillation device

• US 7,248,126 B2
• Filed: 11/13/2003
• Issued: 07/24/2007
• Est. Priority Date: 11/14/2002
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Kanbe, Shinichi
• Primary Examiner(s): Lee; Benny
• Assistant Examiner(s): Goodley; James
• Application Number:
  US10/503,088
• Publication Number:
  US 20050128016A1
• Time in Patent Office: 1,349 Days
• Field of Search: 331/66, 331/176, 331/74
• US Class Current: 331/66
• CPC Class Codes: G01S 13/34 using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
• CPC Class Codes: G01S 7/4008 of transmitters
• CPC Class Codes: H03L 1/026 by using a memory for digitally storing correction values H03L1/025 takes precedence

Abstract

A temperature correcting apparatus divides an actually measured waveform of correcting voltages, which are required at each of different temperatures, by a minimum resolution of D/A conversion; obtains voltage digital values representing voltage values at individual dividing points of the actually measured waveform, and obtains times corresponding to the voltage digital values; prestores pairs of the voltage digital values and times together with addresses as correcting data; reads out the correcting data in response to the detection address representing the temperature; extracts or calculates from the correcting data the voltage digital values and times about the correcting voltages required by the detection address; and sequentially supplying a D/A converter with the resultant voltage digital values in synchronization with the corresponding times.

Claims

1. A temperature correcting apparatus comprising:

a storing unit for storing correcting data for individual temperatures in correspondence with addresses representing the individual temperatures, the correcting data for an individual temperature being generated by dividing an actually measured waveform of correcting voltages, which are required by an apparatus to be corrected at the individual temperatures, by a positive integer multiple of a minimum resolution of a D/A converter to obtain voltage digital values representing voltage values at individual dividing points of the actually measured waveform and times corresponding to the dividing points, and generating a plurality of pairs consisting of the voltage digital values and the corresponding times;

temperature sensor means for detecting an ambient temperature of the apparatus to be corrected and producing a detection voltage;

an A/D converter for A/D converting the detection voltage to a detection address representing the temperature;

processing means for reading out correcting data from said storing unit according to the detection address, extracting or calculating the voltage digital values about the correcting voltages required by the detection address, and the times corresponding to the voltage digital values from the correcting data, and for sequentially outputting the resultant voltage digital values in synchronization with the times; and

a D/A converter for generating correcting voltages to be supplied to said apparatus to be corrected by performing D/A conversion of the voltage digital values output.

2. The temperature correcting apparatus according to claim 1, wherein

said storing unit prestores correcting data of each of two different temperatures, and

said processing means comprises:

read-out means for reading correcting data of each of the two temperatures in response to the detection address;

coefficient calculating means for calculating a temperature difference ratio of a temperature indicated by the detection address from the addresses of the correcting data of the two temperatures read out and from the detection address;

time calculating means for calculating output times for carrying out the D/A conversion from the times corresponding to the voltage digital values indicating same voltage values of the correcting data of the two temperatures and from the temperature difference ratio; and

voltage digital value output means for sequentially outputting the voltage digital values of the same voltage values in synchronization with the calculated output times, as voltage digital values required by the detection address.

3. The temperature correcting apparatus according to claim 1, wherein

said storing unit prestores correcting data of each of a plurality of temperatures, and

said processing means comprises:

temperature retrieval means for retrieving two addresses representing two adjacent temperatures closest to a temperature indicated by the detection address from a plurality of addresses in said storing unit in response to the detection address,

read-out means for reading the correcting data corresponding to the two retrieved addresses according to the two addresses;

coefficient calculating means for calculating a temperature difference ratio of a temperature indicated by the detection address from the correcting data of the two temperatures read out and from the detection address;

time calculating means for calculating output times for carrying out the D/A conversion from the times corresponding to the voltage digital values indicating same voltage values of the correcting data of the two temperatures and from the temperature difference ratio; and

voltage digital value output means for sequentially outputting the voltage digital values of the same voltage values in synchronization with the calculated output times, as voltage digital values required by the detection address.

4. A temperature correcting apparatus comprising:

a storing unit for storing a plurality of pairs of digital data consisting of pairs of voltage data and time data corresponding to the voltage data for each of a plurality of different detection addresses corresponding to a plurality of temperatures;

an A/D converter for carrying out A/D conversion of an ambient temperature detected by a temperature sensor, and for outputting a corresponding detection address through the A/D conversion;

a processor for acquiring, according to the detection address output from said A/D converter, a plurality of pairs of the digital data corresponding the detection address from said storing unit, and for sequentially outputting voltage data corresponding to the time data in response to timings determined by the time data of the digital data acquired; and

a D/A converter for carrying out D/A conversion of the voltage data output from said processor, and for supplying D/A conversion results to said apparatus to be corrected, wherein

said processor sequentially outputs the voltage data at intervals of a positive integer multiple of a minimum resolution of said D/A converter.

5. A voltage-controlled oscillation apparatus having a voltage-controlled oscillator and a temperature correcting apparatus for carrying out temperature correction of said voltage-controlled oscillator, said temperature correcting apparatus comprising:

a storing unit for storing correcting data for individual temperatures in correspondence with addresses representing the individual temperatures, the correcting data for an individual temperature being generated by dividing an actually measured waveform of correcting voltages, which are required by an apparatus to be corrected at each of a plurality of different temperatures, by a positive integer multiple of a minimum resolution of a D/A converter to obtain voltage digital values representing voltage values at individual dividing points of the actually measured waveform and times corresponding to the dividing points, and generating a plurality of pairs consisting of the voltage digital values and the corresponding times at each temperature as the correcting data;

temperature sensor means for detecting an ambient temperature of the apparatus to be corrected and producing a detection voltage;

an A/D converter for A/D converting the detection voltage to produce detection address representing the temperature,

processing means for reading out correcting data from said storing unit according to the detection address, extracting or calculating the voltage digital values about the correcting voltages required by the detection address, and the times corresponding to the voltage digital values from the correcting data, and for sequentially outputting the resultant voltage digital values in synchronization with the times; and

a D/A converter for generating correcting voltages to be supplied to said apparatus to be corrected by performing D/A conversion of the voltage digital values output.

6. The voltage-controlled oscillation apparatus according to claim 5, wherein

said storing unit prestores correcting data of each of two different temperatures, and

said processing means comprises:

read-out means for reading correcting data of each of the two temperatures in response to the detection address;

coefficient calculating means for calculating a temperature difference ratio of a temperature indicated by the detection address from the addresses of the correcting data of the two temperatures read out and from the detection address;

time calculating means for calculating output times for carrying out the D/A conversion from the times corresponding to the voltage digital values indicating same voltage values of the correcting data of the two temperatures and from the temperature difference ratio; and

voltage digital value output means for sequentially outputting the voltage digital values of the same voltage values in synchronization with the calculated output times, as voltage digital values required by the detection address.

7. The voltage-controlled oscillation apparatus according to claim 5, wherein

said storing unit prestores correcting data of each of a plurality of temperatures, and

said processing means comprises:

temperature retrieval means for retrieving two addresses representing two adjacent temperatures closest to a temperature indicated by the detection address from a plurality of addresses in said storing unit in response to the detection address;

read-out means for reading the correcting data corresponding to the two retrieved addresses according to the two addresses;

coefficient calculating means for calculating a temperature difference ratio of a temperature indicated by the detection address from the correcting data of the two temperatures read out and from the detection address;

time calculating means for calculating output times for carrying out the D/A conversion from the times corresponding to the voltage digital values indicating same voltage values of the correcting data of the two temperatures and from the temperature difference ratio; and

voltage digital value output means for sequentially outputting the voltage digital values of the same voltage values in synchronization with the calculated output times, as voltage digital values required by the detection address.

9. The voltage-controlled oscillation apparatus according to claim 5, wherein said voltage-controlled oscillation apparatus is supplied with the correcting voltage of a specified voltage waveform, and modulates a transmission wave of an FM-CW radar by the specified voltage waveform.

8. A voltage-controlled oscillation apparatus having a voltage-controlled oscillator and a temperature correcting apparatus for carrying out temperature correction of said voltage-controlled oscillator, said temperature correcting apparatus comprising:

a storing unit for storing a plurality of pairs of digital data consisting of pairs of voltage data and time data corresponding to the voltage data for each of a plurality of different detection addresses corresponding to a plurality of temperatures;

an A/D converter for carrying out A/D conversion of an ambient temperature detected by a temperature sensor, and for outputting a corresponding detection address through the A/D conversion;

a processor for acquiring, according to the detection address output from said A/D converter, a plurality of pairs of the digital data corresponding the detection address from said storing unit, and for sequentially outputting voltage data corresponding to the time data in response to timings determined by the time data of the digital data acquired; and

a D/A converter for carrying out D/A conversion of the voltage data output from said processor, and for supplying D/A conversion results to said apparatus to be corrected, wherein

said processor sequentially outputs the voltage data at intervals of a positive integer multiple of a minimum resolution of said D/A converter.

10. The voltage-controlled oscillation apparatus according to claim 8, wherein said voltage-controlled oscillation apparatus is supplied with the correcting voltage of a specified voltage waveform, and modulates a transmission wave of an FM-CW radar by the specified voltage waveform.