US5329245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid high power amplifier
Assignee: United States Department of the Navy
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Filing: 1993-06-28
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Granted: 1994-07-12
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Expires: 2013-06-28
Abstract
Abstract The invention provides a high power, low distortion, high efficiency ampler design incorporating a high efficiency switching amplifier used in conjunction with a linear difference amplifier. The high efficiency switching amplifier, typically of full or half bridge design, is designed to generate a high efficiency, arbitrarily formed, wave portion such as a square wave. The high efficiency waveform is scaled down and is compared to a desired reference, such as a sinusoid. The output of the comparison is the analog difference (mathematical subtraction) between the reference waveform and the scaled-down switch amplifier output wave. This "difference" signal is then used to drive the linear difference amplifier which simply scales the signal linearly. The two power signals, one from the switching amplifier and the other from the linear difference amplifier, are then summed magnetically. To permit a low harmonic output, the input signals to the switching amplifier and the reference are locked together in frequency.
Inventors
- 👤 Russell E. Hammond
- 👤 Leopold J. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:55
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0277; H03F3/00; H03F3/20; H03F3/21; H03F3/211; H03F3/217; H03F2200/00; H03F2200/432
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
122 words
An amplifier apparatus comprising: a first amplifier for producing a high efficiency waveform of a first shape; a reference waveform generator for producing a reference waveform of a second shape different than said first shape; a clock for synchronizing said high efficiency waveform and said reference waveform; a comparator for comparing said high efficiency waveform to said reference waveform to produce a difference waveform that is formed from a mathematical difference between said high efficiency waveform and said reference waveform; a second amplifier for amplifying said difference waveform to produce an amplified difference waveform; and a summer for summing said amplified difference waveform and said high efficiency waveform to produce an amplified waveform of a shape substantially similar to said reference waveform.
Claim 2
Dependent Claim
122 words
An amplifier apparatus comprising: a first amplifier for producing a high efficiency waveform of a first shape; a reference waveform generator for producing a reference waveform of a second shape different than said first shape; a clock for synchronizing said high efficiency waveform and said reference waveform; a comparator for comparing said high efficiency waveform to said reference waveform to produce a difference waveform that is formed from a mathematical difference between said high efficiency waveform and said reference waveform; a second amplifier for amplifying said difference waveform to produce an amplified difference waveform; and a summer for summing said amplified difference waveform and said high efficiency waveform to produce an amplified waveform of a shape substantially similar to said reference waveform.
Claim 3
Dependent Claim
27 words
An apparatus according to claim 1 further including an attenuator scaler for attenuating/scaling said high efficiency waveform before said high efficiency waveform is compared in said comparator.
Claim 4
Dependent Claim
15 words
An apparatus according to claim 1 in which said first amplifier includes a switching amplifier.
Claim 5
Dependent Claim
20 words
An apparatus according to claim 3 in which said high efficiency waveform of said first shape has a squarewave shape.
Claim 6
Dependent Claim
17 words
An apparatus according to claim 4 in which said switching amplifier is a Class D switching amplifier.
Claim 7
Dependent Claim
16 words
An apparatus according to claim 5 in which said switching amplifier is of a bridge design.
Claim 8
Dependent Claim
17 words
An apparatus according to claim 6 in which said first amplifier includes a plurality of switching amplifiers.
Claim 9
Dependent Claim
15 words
An apparatus according to claim 1 in which said second amplifier is a linear amplifier.
Claim 10
Dependent Claim
16 words
An apparatus according to claim 8 in which said linear amplifier is a Class A amplifier.
Claim 11
Dependent Claim
16 words
An apparatus according to claim 8 in which said linear amplifier is a Class B amplifier.
Claim 12
Dependent Claim
19 words
An apparatus according to claim 1 in which said reference waveform of said second shape has a sinusoid shape.
Claim 13
Dependent Claim
14 words
An apparatus according to claim 1 in which said summer is a magnetic summer.
Claim 14
Dependent Claim
123 words
A hybrid amplifier apparatus comprising: a switching amplifier for producing a high efficiency waveform of a first shape; a reference waveform generator for producing a reference waveform of a second shape different than said first shape; a clock for synchronizing said high efficiency waveform and said reference waveform; a comparator for comparing said high efficiency waveform to said reference waveform to produce a difference waveform that is formed from a mathematical difference between said high efficiency waveform and said reference waveform; a linear amplifier for amplifying said difference waveform to produce an amplified difference waveform; and a summer for summing said amplified difference waveform and said high efficiency waveform to produce an amplified waveform of a shape substantially similar to said reference waveform.
Claim 15
Dependent Claim
123 words
A hybrid amplifier apparatus comprising: a switching amplifier for producing a high efficiency waveform of a first shape; a reference waveform generator for producing a reference waveform of a second shape different than said first shape; a clock for synchronizing said high efficiency waveform and said reference waveform; a comparator for comparing said high efficiency waveform to said reference waveform to produce a difference waveform that is formed from a mathematical difference between said high efficiency waveform and said reference waveform; a linear amplifier for amplifying said difference waveform to produce an amplified difference waveform; and a summer for summing said amplified difference waveform and said high efficiency waveform to produce an amplified waveform of a shape substantially similar to said reference waveform.
Claim 16
Dependent Claim
26 words
An apparatus according to claim 13 further including an attenuator/scaler for attenuating/scaling said high efficiency waveform before said high efficiency waveform is compared in said comparator.
Claim 17
Dependent Claim
20 words
An apparatus according to claim 13 in which said high efficiency waveform of said first shape has a squarewave shape.
Claim 18
Dependent Claim
17 words
An apparatus according to claim 15 in which said switching amplifier includes a Class D switching amplifier.
Claim 19
Dependent Claim
19 words
An apparatus according to claim 15 in which said reference waveform of said second shape has a sinusoid shape.
Claim 20
Dependent Claim
16 words
An apparatus according to claim 16 in which said switching amplifier is of a bridge design.
Claim 21
Dependent Claim
19 words
An apparatus according to claim 16 in which said switching amplifier includes a plurality of Class D switching amplifiers.
Claim 22
Dependent Claim
16 words
An apparatus according to claim 16 in which said linear amplifier is a Class A amplifier.
Claim 23
Dependent Claim
16 words
An apparatus according to claim 16 in which said linear amplifier is a Class B amplifier.
Claim 24
Dependent Claim
14 words
An apparatus according to claim 20 in which said summer is a magnetic summer.
Claim 25
Dependent Claim
14 words
An apparatus according to claim 21 in which said summer is a magnetic summer.
Claim 26
Dependent Claim
143 words
A hybrid amplifier apparatus comprising: a Class D switching amplifier for producing a high efficiency waveform of a squarewave shape; an attenuator/scaler for attenuating/scaling said high efficiency waveform to produce an attenuated/scaled high efficiency waveform; a reference waveform generator for producing a reference waveform of a sinusoid shape; a clock for synchronizing said high efficiency waveform and said reference waveform; a comparator for comparing said attenuated/scaled high efficiency waveform to said reference waveform to produce a difference waveform that is formed from a mathematical difference between said attenuated/sealed high efficiency waveform and said reference waveform; a linear amplifier for amplifying said difference waveform to produce an amplified difference waveform; and a summer for summing said amplified difference waveform and said high efficiency waveform to produce an amplified waveform that is of a shape substantially similar to said reference waveform of said sinusoid shape.
Claim 27
Dependent Claim
143 words
A hybrid amplifier apparatus comprising: a Class D switching amplifier for producing a high efficiency waveform of a squarewave shape; an attenuator/scaler for attenuating/scaling said high efficiency waveform to produce an attenuated/scaled high efficiency waveform; a reference waveform generator for producing a reference waveform of a sinusoid shape; a clock for synchronizing said high efficiency waveform and said reference waveform; a comparator for comparing said attenuated/scaled high efficiency waveform to said reference waveform to produce a difference waveform that is formed from a mathematical difference between said attenuated/sealed high efficiency waveform and said reference waveform; a linear amplifier for amplifying said difference waveform to produce an amplified difference waveform; and a summer for summing said amplified difference waveform and said high efficiency waveform to produce an amplified waveform that is of a shape substantially similar to said reference waveform of said sinusoid shape.
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