Temperature Correcting Apparatus and Voltage-Controlled Oscillation Apparatus

• US 20070229179A1
• Filed: 06/07/2007
• Published: 10/04/2007
• Est. Priority Date: 11/14/2002
• Status: Active Grant

• Current Assignee: Shinichi Kanbe
• Original Assignee: Shinichi Kanbe
• Inventors: Kanbe, Shinichi
• Granted Patent: US 7,642,875 B2
• Time in Patent Office: Days
• US Class Current: 331/176
• 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 (36) 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 times corresponding to voltage digital values representing voltage values at individual dividing points of the actually measured waveform, and generating a plurality of the corresponding times;

a temperature sensor 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;

a processor for reading out correcting data from said storing unit according to the detection address, extracting or calculating the times corresponding to the voltage digital values from the correcting data, and for sequentially outputting the voltage digital values corresponding to the times, 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.

3. The temperature correcting apparatus according to claim 1 or claim 2, wherein the apparatus to be corrected is a voltage-controlled oscillation apparatus such that a transmission wave in an FM-CW radar is modulated by a specified voltage waveform, to be supplied with the correcting voltage of the specified voltage waveform.

2. A temperature correcting apparatus comprising:

a storing unit for storing digital data including time 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 obtained 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, the digital data corresponding to the detection address from said storing unit, and for sequentially outputting voltage data corresponding to the time data, in response to timings defined 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.