Systems and methods for operating a bias controller for an amplifier circuit
AssigneeNXP USA, Inc.
InventorsElie A. Maalouf, Xu Jason Ma, Ngai-Ming Lau
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Abstract
Embodiments of a method and a device are disclosed. In an embodiment, a method for operating a bias controller for an amplifier circuit involves obtaining temperature data corresponding to a temperature of the amplifier circuit, generating a proportional to absolute temperature (PTAT) bias voltage based on a first PTAT slope when the temperature is within a first range of temperatures or a second PTAT slope when the temperature is within a second range of temperatures, wherein the second PTAT slope is greater than the first PTAT slope, and biasing the amplifier circuit based on the generated PTAT bias voltage.
Claims18
A method for operating a bias controller for an amplifier circuit, the method comprising:
- obtaining temperature data corresponding to a temperature of the amplifier circuit;
- generating a proportional to absolute temperature (PTAT) bias voltage based on a first PTAT slope when the temperature is within a first range of temperatures or a second PTAT slope when the temperature is within a second range of temperatures, wherein the second PTAT slope is greater than the first PTAT slope, and wherein PTAT slope is a linear relationship between a voltage and a temperature;
- and
- biasing the amplifier circuit based on the generated PTAT bias voltage, wherein biasing the amplifier circuit comprises:
- summing the PTAT bias voltage and a zero to absolute temperature (ZTAT) reference voltage to generate a bias voltage for the amplifier circuit.
A bias controller for an amplifier circuit, the bias controller comprising:
- a proportional to absolute temperature (PTAT) bias voltage generator circuit configured to
- obtain temperature data corresponding to a temperature of the amplifier circuit, and
- generate a PTAT bias voltage based on a first PTAT slope when the temperature is within a first range of temperatures or a second PTAT slope when the temperature is within a second range of temperatures, wherein the second PTAT slope is greater than the first PTAT slope, and wherein PTAT slope is a linear relationship between a voltage and a temperature;
- and
- a biasing circuit configured to bias the amplifier circuit based on the generated PTAT bias voltage;
- wherein the temperature data comprises digital temperature data from a temperature sensor circuit.
A proportional to absolute temperature (PTAT) bias voltage generator circuit for biasing an amplifier circuit, the PTAT bias voltage generator circuit comprising:
- a controllable current source that includes
- a PTAT reference current circuit configured to generate a PTAT reference current,
- a programmable current source configured to obtain temperature data and to
- generate a PTAT current based on the PTAT reference current and the temperature data, the temperature data corresponding to a temperature of the amplifier circuit, wherein the PTAT current has a first PTAT slope when the temperature is less than or equal to a temperature threshold or has a second PTAT slope when the temperature is greater than the temperature threshold, wherein the second PTAT slope is greater than the first PTAT slope, and wherein PTAT slope is a linear relationship between a voltage and a temperature;
- and
- a current to voltage converter circuit configured to convert the PTAT current to a PTAT bias voltage for the amplifier circuit.
Dependencies are inferred from the claim text.