Adaptive wideband digital amplifier for linearly modulated signal amplification and transmission

• US 20050062529A1
• Filed: 09/19/2003
• Published: 03/24/2005
• Est. Priority Date: 09/19/2003
• Status: Active Grant

• Current Assignee: Eagle Technology, LLC (L3Harris Technologies, Inc.)
• Original Assignee: M/A Com
• Inventors: Gan, Hong, Dennis, Anthony
• Granted Patent: US 7,091,778 B2
• Time in Patent Office: Days
• US Class Current: 330/136
• CPC Class Codes: H03F 1/0211 with control of the supply voltage or current
• CPC Class Codes: H03F 1/0277 Selecting one or more amplifiers from a plurality of amplifiers
• CPC Class Codes: H03F 1/32 Modifications of amplifiers to reduce non-linear distortion by negative feedback H03F1/34
• CPC Class Codes: H03F 3/211 using a combination of several amplifiers H03F3/60 takes precedence
• CPC Class Codes: H03G 3/3036 in high-frequency amplifiers or in frequency-changers H03G3/3052, H03G3/32, H03G3/34 take precedence

Abstract

An apparatus including an amplitude mapping circuit for converting at least a portion of an amplitude signal to a binary value and a plurality of amplifiers coupled to the amplitude mapping circuit, such that the binary value is transmitted to at least one of the plurality of amplifiers to specify a gain level of the amplifier. The apparatus may be used in a system where an input wave has been divided into amplitude and frequency components.

Claims

1. An apparatus comprising:

an amplitude mapping circuit for converting at least a portion of an amplitude signal to a binary value; and

,

a plurality of amplifiers coupled to the amplitude mapping circuit,

wherein the binary value is transmitted to at least one of the plurality of amplifiers to specify a gain level of the amplifier.

2. The apparatus of claim 1, further comprising:

a rectangular to polar converter for converting a signal into amplitude and phase portions, and for transmitting said amplitude portion to the amplitude mapping circuit.

3. The apparatus of claim 2, further comprising:

a phase modulator for modulating the phase portion with a carrier signal.

4. The apparatus of claim 2, further comprising:

a mixer for modulating the phase portion with a carrier signal.

5. The apparatus of claim 1, further comprising:

at least one gain control source for applying the binary value to at least one of the plurality of amplifiers.

6. The apparatus of claim 1, further comprising:

an input matching circuit coupled to the respective inputs of the plurality of amplifiers; and

an output matching circuit coupled to the respective outputs of the plurality of amplifiers.

7. The apparatus of claim 6, further comprising:

at least one gain control source coupled to a control terminal of at least one of the plurality of amplifiers.

8. A method for processing a signal, comprising the steps of:

separating the signal into amplitude and phase components;

generating a binary representation of at least a portion of the amplitude component; and

,

specifying a gain level of one of a plurality of amplifiers in response to the generated binary representation.