Pulse shaping biasing circuitry
First Claim
1. Pulse shaping biasing circuitry for a radio frequency (RF) power amplifier comprising:
- signal summation circuitry configured to add one or more signals to provide at least a portion of a pulse-shaped bias signal for the RF power amplifier;
a square wave signal generator coupled between an input node and the signal summation circuitry and configured to generate a square wave signal;
first inverse ramp signal generator circuitry coupled in parallel with the square wave signal generator circuitry between the input node and the signal summation circuitry and configured to generate a first inverted ramp signal having a first slope and a first duration; and
second inverse ramp signal generator circuitry coupled in parallel with the square wave signal generator circuitry and the first inverse ramp signal generator circuitry between the input node and the signal summation circuitry and configured to generate a second inverted ramp signal having a second slope and a second duration, wherein the first slope is different from the second slope and the first duration is different from the second duration.
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Accused Products
Abstract
Pulse shaping biasing circuitry includes square wave generator circuitry, first inverse ramp signal generator circuitry, and second inverse ramp signal generator circuitry. The square wave generator circuitry is coupled between an input node and signal summation circuitry, and is configured to generate a square wave signal. The first inverse ramp signal generator circuitry is coupled in parallel with the square wave generator circuitry and configured to generate a first inverted ramp signal. The second inverse ramp signal generator circuitry is coupled in parallel with the square wave generator circuitry and the first inverse ramp signal generator circuitry and configured to generate a second inverted ramp signal. The square wave signal, the first inverted ramp signal, and the second inverted ramp signal are combined by the signal summation circuitry to provide a pulse shaping bias signal for a radio frequency (RF) power amplifier.
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Citations
20 Claims
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1. Pulse shaping biasing circuitry for a radio frequency (RF) power amplifier comprising:
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signal summation circuitry configured to add one or more signals to provide at least a portion of a pulse-shaped bias signal for the RF power amplifier; a square wave signal generator coupled between an input node and the signal summation circuitry and configured to generate a square wave signal; first inverse ramp signal generator circuitry coupled in parallel with the square wave signal generator circuitry between the input node and the signal summation circuitry and configured to generate a first inverted ramp signal having a first slope and a first duration; and second inverse ramp signal generator circuitry coupled in parallel with the square wave signal generator circuitry and the first inverse ramp signal generator circuitry between the input node and the signal summation circuitry and configured to generate a second inverted ramp signal having a second slope and a second duration, wherein the first slope is different from the second slope and the first duration is different from the second duration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio frequency (RF) transmitter section for a mobile terminal comprising:
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a modulator configured to receive a baseband signal and modulate the baseband signal at a desired carrier frequency; RF power amplifier circuitry coupled to the modulator and configured to receive the baseband signal from the modulator and a supply voltage and amplify the baseband signal for transmission from an antenna; and pulse shaping biasing circuitry coupled to the RF power amplifier circuitry, the pulse shaping biasing circuitry configured to linearize a gain response of the RF power amplifier circuitry and comprising; signal summation circuitry configured to add one or more signals to provide at least a portion of a pulse-shaped bias signal for the RF power amplifier; a square wave signal generator coupled between an input node and the signal summation circuitry and configured to generate a square wave signal; first inverse ramp signal generator circuitry coupled in parallel with the square wave signal generator circuitry between the input node and the signal summation circuitry and configured to generate a first inverted ramp signal having a first slope and a first duration; and second inverse ramp signal generator circuitry coupled in parallel with the square wave signal generator circuitry and the first inverse ramp signal generator circuitry between the input node and the signal summation circuitry and configured to generate a second inverted ramp signal having a second slope and a second duration, wherein the first slope is different from the second slope and the first duration is different from the second duration. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification