Radio frequency amplifier with reduced intermodulation distortion

A technology for amplifying stages and amplifying signals, which is applied in the field of broadband amplification devices, can solve problems such as reducing battery life, and achieve the effects of easy implementation and low power requirements

Inactive Publication Date: 2005-03-16
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, it is not desirable to increase the power consumption of the amplifier in the device, as this wou

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  • Radio frequency amplifier with reduced intermodulation distortion
  • Radio frequency amplifier with reduced intermodulation distortion
  • Radio frequency amplifier with reduced intermodulation distortion

Examples

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Example Embodiment

[0037] reference figure 1 The device 6 for amplifying a signal (for example, a portable wireless receiver such as a cellular phone) includes a receiver input terminal 8, an amplifier 10, a receiver output terminal 12, and a power source 14 (for example, a battery). The receiver input 8 is used to receive an electromagnetic signal 16 (for example, a signal with a frequency greater than 100 MHz, and possibly a signal with a frequency greater than 500 MHz) from the transmitter 18 and to generate an electrical signal 20. The amplifier 10 receives the signal 20 and sends the amplified signal 22 to the receiver output terminal 12, which converts the amplified signal 22 into an appropriate output signal 24 (for example, a speech representation of a human voice).

[0038] Even though figure 1 Only one electromagnetic signal 16 is shown in, but the receiver input 8 can typically receive other signals (different frequencies). As described above, when two or more tones are received at the r...

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Abstract

Apparatus and methods of broadband amplification with high linearity and low power consumption are described. An apparatus configured to amplify a signal includes an input transistor and an output transistor coupled together in a cascode configuration with the input transistor defining an input of the amplifier and the output transistor defining an output of the amplifier. A feedback network is coupled between the input and the output and is characterized by an impedance of substantially zero resistance and non-zero reactance. A method of amplifying a signal is also described. An input signal is received at an input; the input signal is amplified to provide an output signal at an output; and the output signal is sampled at the input through a feedback network characterized by an impedance of substantially zero resistance and ion-zero reactance. A method of making an apparatus configured to amplify a signal is also described.

Description

technical field [0001] The present invention generally relates to apparatus and methods for broadband amplification with high linearity and low power consumption. Background technique [0002] Broadband signal amplifiers and methods for amplifying signals over a wide frequency range have many uses. For example, wireless communication devices such as cellular phones, cordless phones, pagers, TV tuners, local area networks, etc. require wide dynamic range, highly linear amplifiers to amplify the strength of received signals without distortion and crosstalk between different frequencies. Unfortunately, however, all linear amplifiers distort the signal being amplified to some extent. This is especially troublesome when two or more independent channels are to be amplified. In these situations, the amplifier will generate unwanted intermodulation products that can cause interference and degrade the performance of the communications equipment. [0003] Intermodulation distortion...

Claims

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Application Information

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IPC IPC(8): H03F1/32H03F1/02H03F1/22H03F1/34
CPCH03F1/34H03F1/22H03F2201/3215
Inventor 约翰尼斯·J·E·M·哈格拉茨
Owner MURATA MFG CO LTD
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