Gain compensation device over temperature and method thereof
First Claim
1. A gain compensation device for adjusting gain of an amplifier over temperature, gain of the amplifier being controlled by signals on a gain control end of the amplifier, the gain compensation device comprising:
- a temperature compensation generator for generating an additional gain parameter according to a reference temperature, a current temperature, and a temperature coefficient;
an adder, comprising;
a first input end, coupled to the temperature compensation generator for receiving the additional gain parameter;
a second input end for receiving a default gain parameter; and
an output end, coupled to the gain control end of the amplifier for outputting sum of the additional gain parameter and the default gain parameter; and
a temperature sensor for providing the current temperature.
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Accused Products
Abstract
A gain compensation device for adjusting gain of an amplifier over temperature is disclosed. The gain of the amplifier is controlled by signals on a gain control end of the amplifier. The gain compensation device comprises a temperature compensation generator, an adder, and a temperature sensor. The temperature compensation generator is for generating an additional gain parameter according to a reference temperature, a current temperature, and a temperature coefficient. The adder comprises a first input end, coupled to the temperature compensation generator for receiving the additional gain parameter, a second input end for receiving a default gain parameter, and an output end coupled to the gain control end of the amplifier for outputting sum of the additional gain parameter and the default gain parameter. The temperature sensor is for providing the current temperature.
55 Citations
21 Claims
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1. A gain compensation device for adjusting gain of an amplifier over temperature, gain of the amplifier being controlled by signals on a gain control end of the amplifier, the gain compensation device comprising:
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a temperature compensation generator for generating an additional gain parameter according to a reference temperature, a current temperature, and a temperature coefficient; an adder, comprising; a first input end, coupled to the temperature compensation generator for receiving the additional gain parameter; a second input end for receiving a default gain parameter; and an output end, coupled to the gain control end of the amplifier for outputting sum of the additional gain parameter and the default gain parameter; and a temperature sensor for providing the current temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An RF transmitter, comprising:
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an RF module, comprising; a local oscillator for providing a clock signal; a divider coupled to the clock signal into a first divided clock signal and a second divided clock signal; wherein the first divided clock signal and the second divided clock signal are different by 90 degrees in phase; a first mixer for receiving an I-path base-band signal and the first divided clock signal and accordingly generating an in-phase signal; a second mixer for receiving a Q-path base-band signal and the second divided clock signal and accordingly generating a quadrature-phase signal; a first adder for receiving the in-phase signal and the quadrature-phase signal and accordingly generating an output signal; and a temperature compensation amplifying module, comprising; a gain compensation device, comprising; a temperature compensation generator for generating an additional gain parameter according to a reference temperature, a current temperature, and a temperature coefficient; a second adder, comprising; a first input end, coupled to the temperature compensation generator for receiving the additional gain parameter; a second input end for receiving a default gain parameter; and an output end for outputting sum of the additional gain parameter and the default gain parameter; and a temperature sensor for providing the current temperature; and
an amplifier, comprising;an input end for receiving the output signal from the first adder; a gain control end, coupled to the output end of the second adder, for receiving the sum of the additional gain parameter and the default gain parameter for the amplifier accordingly controlling gain of the amplifier; and an output end for outputting the received output signal amplified with the controlled gain. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method for compensating gain of an amplifier over temperature, the gain of the amplifier being controlled by a default gain parameter received on a gain control end of the amplifier, the method comprising:
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setting a temperature coefficient according to relation between actual gain of the amplifier and temperature; generating an additional gain parameter according to the temperature coefficient, a current temperature, and a reference temperature; and adding the additional gain parameter to the default gain parameter. - View Dependent Claims (17, 18)
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19. A method for compensating gain of an amplifier over temperature, the gain of the amplifier being controlled by a default gain parameter received on a gain control end of the amplifier, the method comprising:
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setting a temperature coefficient according to relation between actual gain of the amplifier and temperature; setting an offset value according to a target power level of an output signal from the amplifier; generating an additional gain parameter according to the temperature coefficient, the offset value, a current temperature, and a reference temperature; and adding the additional gain parameter to the default gain parameter. - View Dependent Claims (20, 21)
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Specification