Temperature compensation device for automatic gain control loop

• US 6,999,012 B2
• Filed: 08/05/2004
• Issued: 02/14/2006
• Est. Priority Date: 10/02/2003
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Hyung-Weon, Kim, Seung-Hwan
• Primary Examiner(s): NGUYEN, LINH V
• Application Number:
  US10/912,664
• Publication Number:
  US 20050073450A1
• Time in Patent Office: 558 Days
• Field of Search: 341/118, 341/119, 341/120, 341155-172
• US Class Current: 341/119
• CPC Class Codes: H03G 3/3068 Circuits generating control signals for both R.F. and I.F. stages
• CPC Class Codes: H03M 1/0621 with auxiliary conversion of a value corresponding to the physical parameter(s) to be compensated for
• CPC Class Codes: H03M 1/185 the determination of the range being based on more than one digital output value, e.g. on a running average, a power estimation or the rate of change

Abstract

A temperature compensation device for an automatic gain control loop in a receiver of a mobile communication terminal is disclosed. The temperature compensation device comprises a thermistor having a resistance varying with temperature to vary its output voltage, an analog/digital converter for converting the output voltage from the thermistor into a digital signal, and a temperature compensator for outputting a temperature compensation value in response to a digital signal based on a specific temperature variation from the analog/digital converter.

Claims

1. A temperature compensation device for an automatic gain control loop in a receiver of a mobile communication terminal, comprising:

a thermistor having a resistance varying with temperature to vary an output voltage;

an analog/digital converter for converting the output voltage from said thermistor into a digital signal; and

a temperature compensator for outputting a temperature compensation value in response to the digital signal based on a specific temperature variation,

wherein said temperature compensator has a plurality of gain change threshold values corresponding respectively to various temperature variations, said temperature compensator outputting one of the gain change threshold values corresponding to said specific temperature variation as said temperature compensation value upon receiving said digital signal based on said specific temperature variation, and said temperature compensator is adapted to provide said gain change threshold value corresponding to said specific temperature variation to a gain determiner. said gain determiner determining a gain of each component of said receiver.

2. The temperature compensation device as set forth in claim 1, further comprising an adder for adding said temperature compensation value from said temperature compensator to a strength of a received signal in said receiver to correct an error in the received signal strength based on said specific temperature variation, and outputting the resulting accurate received signal strength.