Temperature recording device

• US 20030006785A1
• Filed: 03/01/2002
• Published: 01/09/2003
• Est. Priority Date: 03/10/2000
• Status: Abandoned Application

• Current Assignee: Microtune GmbH & Co. KG (Qualcomm, Inc.)
• Original Assignee: Microtune GmbH & Co. KG (Qualcomm, Inc.)
• Inventors: Reiss, Manfred
• Application Number:
  US10/009,137
• Publication Number:
  US 20030006785A1
• Time in Patent Office: Days
• US Class Current: 324/703
• CPC Class Codes: G01K 7/22 the element being a non-linear resistance, e.g. thermistor G01K7/26 takes precedence

Abstract

A temperature detection device is provided for an electronic circuit, in particular for a HF tuner. The temperature detection device comprises a temperature detector, an analog-to-digital converter and a standardized serial bus. At its output the temperature detector makes available a temperature-dependent voltage that is a predetermined function of the temperature. The temperature-dependent voltage is applied to the input of the analog-to-digital converter. On its output side, the analog-to-digital converter is coupled to the standardized serial bus.

Claims

1. Temperature detection device for an electronic circuit, comprising the following:

a temperature detector, which at its output makes available a voltage (V_t) that is a predetermined function of the temperature;

an analog-to-digital converter (14), to the input of which the temperature-dependent voltage (V_t) is applied; and

a standardized serial bus (16), to which the output of the analog-to-digital converter (14) is coupled.

2. Temperature detection device according to claim 1, characterized in that the temperature detector consists of a voltage divider comprising a temperature sensor (10) and a resistance element (12).

3. Temperature detection device according to claim 2, characterized in that the temperature sensor (10) is a barretter (PCT resistor) or a high-temperature thermistor (NTC).

4. Temperature detection device according to one of the claims 1 to 3, characterized in that the standardized serial bus is an I²C bus or a 3-wire bus.

5. Temperature detection device according to one of the claims 1 to 4, characterized in that the temperature detection device is provided for a HF tuner.

6. Temperature detection device according to claim 5, characterized in that the analog-to-digital converter (14) is part of an integrated PLL circuit of the HF tuner.