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US 10,566,937 B2Granted
Post distortion cancellation with phase shifter diode for low noise amplifier
AssigneeQUALCOMM Incorporated
InventorsMohammad Sadegh Mehrjoo, Chuan Wang, Yanming Xiao, Li-chung Chang, Kevin Hsi Huai Wang
Life of this patent
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Abstract
A low noise amplifier may include a post distortion cancellation block coupled to the low noise amplifier. The post distortion cancellation block may include a diode, and phase-shift logic. The phase-shift logic may be coupled in series with the diode.
Claims21
A radio frequency (RF) receiver comprising:
- a low noise amplifier comprising a first cascode transistor and a second cascode transistor;
- a post distortion cancellation block coupled to the low noise amplifier between the first cascode transistor and the second cascode transistor, the post distortion cancellation block, comprising:
- a diode, and
- phase-shift logic coupled in series with the diode, wherein a power detector is coupled to the post distortion cancellation block and an output of the low noise amplifier.
1 more element
A method for performing post distortion cancellation in a low noise amplifier, comprising:
- detecting a power level at an output of the low noise amplifier;
- selecting a bias setting and a resistance-capacitance setting according to the power level detected at the output of the low noise amplifier;
- and
- programming a post distortion cancellation block of the low noise amplifier with the bias setting and the resistance-capacitance setting.
1 more element
A low noise amplifier comprising:
- a post distortion cancellation block coupled to the low noise amplifier, the post distortion cancellation block, comprising:
- a diode, and
- phase-shift logic coupled in series with the diode;
- and
- means for programming the post distortion cancellation block with a bias setting and a resistance-capacitance setting selected according to an output power level of the low noise amplifier.
2 more elements
A radio frequency (RF) receiver comprising:
- a low noise amplifier comprising a first cascode transistor and a second cascode transistor;
- and
- a post distortion cancellation block coupled to the low noise amplifier between the first cascode transistor and the second cascode transistor, the post distortion cancellation block, comprising:
- a diode, and
- phase-shift logic coupled in series with the diode, in which the phase-shift logic comprises a resistor-capacitor (RC) filter.
2 more elements
A radio frequency (RF) receiver comprising:
- a low noise amplifier comprising a first cascode transistor and a second cascode transistor;
- and
- a post distortion cancellation block coupled to the low noise amplifier between the first cascode transistor and the second cascode transistor, the post distortion cancellation block, comprising:
- a diode,
- phase-shift logic coupled in series with the diode,
- a first phase-shift cancellation block coupled to a high gain branch of the low noise amplifier, and
- a second phase-shift cancellation block coupled to a low gain branch of the low noise amplifier.
4 more elements
Dependencies are inferred from the claim text.