AMPLIFYING APPARATUS WITH IMPROVED LINEARITY
First Claim
1. An amplifying apparatus comprising:
- an amplifying circuit comprising a power amplifier, a bias circuit, and a temperature control circuit, wherein the bias circuit is configured to;
detect an ambient temperature of the power amplifier;
output a temperature voltage based on the detection of the ambient temperature;
regulate an internal current based on an input control signal, andsupply a bias current obtained by the regulation of the internal current to the power amplifier; and
the temperature control circuit is configured to generate the control signal based on the temperature voltage during an initial driving from a transmission mode starting point in time to an input point in time at which an input signal is input, and outputting the control signal to the amplifying circuit.
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Abstract
An amplifying apparatus is provided. The amplifying apparatus comprises an amplifying circuit comprising a power amplifier and a bias circuit, the bias circuit is configured to detect an ambient temperature of the power amplifier to output a temperature voltage and regulate an internal current based on an input control signal to supply a bias current obtained by the regulation to the power amplifier; and a temperature control circuit that generates the control signal based on the temperature voltage during initial driving from a transmission mode starting point in time to an input point in time at which an input signal is input and outputting the control signal to the amplifying circuit.
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Citations
16 Claims
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1. An amplifying apparatus comprising:
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an amplifying circuit comprising a power amplifier, a bias circuit, and a temperature control circuit, wherein the bias circuit is configured to; detect an ambient temperature of the power amplifier; output a temperature voltage based on the detection of the ambient temperature; regulate an internal current based on an input control signal, and supply a bias current obtained by the regulation of the internal current to the power amplifier; and the temperature control circuit is configured to generate the control signal based on the temperature voltage during an initial driving from a transmission mode starting point in time to an input point in time at which an input signal is input, and outputting the control signal to the amplifying circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An amplifying apparatus comprising:
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an amplifying circuit comprising a power amplifier, a temperature detection circuit, and a bias circuit, wherein the temperature detection circuit is configured to detect an ambient temperature of the power amplifier to output a temperature voltage, and the bias circuit is configured to regulate an internal current based on an input control signal to supply a bias current obtained by the regulation to the power amplifier; and a temperature control circuit configured to generate the control signal based on the temperature voltage during an initial driving from a transmission mode starting point in time to an input point in time at which an input signal is input, and output the control signal to the amplifying circuit. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification