Control method for producing a ramp of output power and transmitter utilizing the same
AssigneeVIA Technologies, Inc.
InventorLiang Yan
Life of this patent
Estimating the term…
Abstract
A transmitter controlling output power to generate a ramp and a method thereof. The transmitter comprises a baseband module, a transmitter module, and a power amplifier. The baseband module receives a power control level, determines a scaling factor according to the power control level, determines a difference between an upper power limit and lower power limit according to a position on the ramp, and calculates a control signal according to the scaling factor, the lower power limit, and the difference. The transmitter module transmits data. The power amplifier coupled to the baseband module and the transmitter module, outputs the data with the output power according the control signal.
Claims12
A method of controlling output power to generate a ramp in a transmitter, comprising:
- receiving a power control level;
- determining a scaling factor according to the power control level;
- determining a difference between an upper power limit and lower power limit according to a position on the ramp;
- compensating the lower power limit according to an operation temperature of the transmitter, wherein the compensation comprises determining a first temperature compensation factor according to the operation temperature, obtaining the compensated lower power limit by adding the first temperature compensation factor to the lower power limit;
- calculating a control signal according to the scaling factor, the compensated lower power limit, and the difference;
- and
- outputting the output power according the control signal.
A transmitter, controlling output power to generate a ramp, comprising:
- a baseband module, receiving a power control level, determining a scaling factor according to the power control level, determining a difference between an upper power limit and lower power limit according to a position on the ramp, compensating the lower power limit according to an operation temperature of the transmitter, determining a first temperature compensation factor according to the operation temperature, wherein the compensated lower power limit is obtained by adding the first temperature compensation factor to the lower power limit and calculating a control signal according to the scaling factor, the lower power limit, and the difference;
- and
- a power amplifier coupled to the baseband module, outputting the output power according the control signal.
A method of controlling output power to generate a ramp in a transmitter, comprising:
- receiving a power control level;
- determining a scaling factor according to the power control level;
- determining a difference between an upper power limit and lower power limit according to a position on the ramp;
- compensating the difference according to an operation temperature of the transmitter, wherein the compensation comprises determining a second temperature compensation factor according to the operation temperature, obtaining the compensated difference by adding the second temperature compensation factor to the difference;
- calculating a control signal according to the scaling factor, the lower power limit, and the compensated difference;
- and
- outputting the output power according the control signal.
A transmitter, controlling output power to generate a ramp, comprising:
- a baseband module, receiving a power control level, determining a scaling factor according to the power control level, determining a difference between an upper power limit and lower power limit according to a position on the ramp, compensating the difference according to an operation temperature of the transmitter, determining a second temperature compensation factor according to the operation temperature, wherein the compensated difference is obtained by adding the second temperature compensation factor to the difference and calculating a control signal according to the scaling factor, the lower power limit, and the compensated difference;
- and
- a power amplifier coupled to the baseband module, outputting the output power according the control signal.
Dependencies are inferred from the claim text.