Wireless receiver and wireless reception method

Patent metadata

Field	Value
Publication number	US-10868501-B2
Application number	US-201916263138-A
Country	US
Kind code	B2
Filing date	Jan 31, 2019
Priority date	Dec 9, 2016
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A wireless receiver and a wireless reception method provide: to determine a gain based on a first resistor having a first temperature characteristic and a second resistor having a second temperature characteristic different from the first resistance; to output an output of the first resistor and an output of the second resistor, or a ratio between the output of the first resistor and the output of the second resistor; and to switches the gain of the first circuit based on the outputs or the ratio between the outputs.

First claim

What is claimed is:

1. A wireless receiver comprising:
a first circuit that converts and outputs a frequency of an input signal and includes a first resistor having a first temperature characteristic and a second resistor having a second temperature characteristic different from the first resistor,
one of the first resistor and the second resistor being connected between a power source and an output terminal of the first circuit,
another of the first resistor and the second resistor being connected between a ground and an input terminal of the first circuit, and
the first circuit having a gain which changes according to temperature change;

a second circuit that includes a third resistor having a same temperature characteristic as the first resistor and a fourth resistor having a same temperature characteristic as the second resistor and provides a resistance division voltage circuit,
the second circuit outputting an output of the third resistor and an output of the fourth resistor, or a ratio between the output of the third resistor and the output of the fourth resistor; and

a third circuit that switches the gain of the first circuit so as to reduce a change of the gain when a ratio between the outputs calculated from the outputs or the ratio between the outputs outputted from the second circuit is changed by a predetermined threshold value or more.

2. The wireless receiver according to claim 1 , wherein:
the first resistor and the third resistor are configured to have a positive or negative temperature characteristic; and
the second resistor and the fourth resistor are configured to have no temperature characteristic.

3. The wireless receiver according to claim 1 , wherein:
the first resistor and the third resistor are configured to have a positive or negative temperature characteristic;
the second resistor and the fourth resistor are configured to have a negative or positive temperature characteristic; and
the temperature characteristic of the first resistor is opposite to the second resistor.

4. The wireless receiver according to claim 1 , wherein:
the second circuit is configured by a mixer circuit or an intermediate frequency amplifier circuit.

5. The wireless receiver according to claim 1 , wherein:
the third circuit is arranged in a reception block including the first circuit and the second circuit.

6. A wireless reception method for switching a gain of a first circuit that converts and outputs a frequency of an input signal and includes a first resistor having a first temperature characteristic and a second resistor having a second temperature characteristic different from the first resistor, one of the first resistor and the second resistor being connected between a power source and an output terminal of the first circuit, another of the first resistor and the second resistor being connected between a ground and an input terminal of the first circuit, and the first circuit having a pain which changes according to temperature change, the wireless reception method comprising:
outputting, from a resistance division voltage circuit, an output of a third resistor having a same temperature characteristic as the first resistor and an output of a fourth resistor having a same temperature characteristic as the second resistor or a ratio between the output of the third resistor and the output of the fourth resistor, the resistance division voltage circuit including the third resistor and the fourth resistor; and
switching the gain of the first circuit, so as to reduce a change of the gain when a ratio between the outputs calculated from the outputs or the ratio between the outputs outputted from the second circuit is changed by a predetermined threshold value or more.

7. The wireless reception method according to claim 6 , further comprising:
providing the first resistor and the third resistor configured to have a positive or negative temperature characteristic; and
providing the second resistor and the fourth resistor configured to have no temperature characteristic.

8. The wireless reception method according to claim 6 , further comprising:
providing the first resistor and the third resistor configured to have a positive or negative temperature characteristic;
providing the second resistor and the fourth resistor configured to have a negative or positive temperature characteristic; and
wherein the temperature characteristic of the first resistor is opposite to the second resistor.

9. The wireless reception method according to claim 6 , further comprising:
providing the second circuit configured by a mixer circuit or an intermediate frequency amplifier circuit.

10. The wireless reception method according to claim 6 , further comprising:
providing the third circuit arranged in a reception block including the first circuit and the second circuit.

Assignees

• Denso Corp

Inventors

• Matsumoto Takashi
• Wachi Yusuke
• Maeda Koji

Classifications

• H03D2200/0098

  by compensating temperature induced variations · CPC title

• H03F2203/45481

  the CSC comprising only a direct connection to the supply voltage, no other components being present · CPC title

• H03F2203/45662

  the LC comprising inductive coupled loading elements · CPC title

• H03D2200/0023

  Balun circuits · CPC title

• H03D7/1433

  using bipolar transistors (H03D7/145 takes precedence) · CPC title