Patent EP0837559A1 successfully refreshed from Google Patents.
EP0837559A1
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High efficiency linear power amplifier of plural frequency bands and high efficiency power amplifier
Assignee: Panasonic Holdings Corp
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Filing: 1997-10-16
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Granted: —
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Expires: 2017-10-16
Abstract
Abstract The invention presents a high efficiency linear power amplifier of plural frequency bands reduced in the number of parts and elements, simplified in the circuit construction, and saved in the circuit space, and in FIG. 1, signals entering from a common input terminal 1 in frequency bands A and B are matched in both frequency bands A and B in a wide band matching network 2, amplified in a pre-amplifier 3, put into a common terminal 4a of a switch circuit 4, and the signal in frequency band A is put into a changeover terminal 4b, matched in a matching network 5 and amplified in a post-amplifier 6, and its output is matched in a post-matching network 7 and sent out into an output terminal 8, while, similarly, the signal in frequency band B is put into other changeover terminal 4c of the switch circuit 4, matched in a matching network 9, amplified in a post-amplifier 10, and its output is matched in a post-matching network 11 and is sent out into an outputs terminal 12. The invention also presents a power amplifier capable of maintaining a similar high efficiency characteristic if the output power is lowered from the output power of maximum efficiency, and in FIG. 10, first and second power amplifiers 113, 114 are disposed in parallel, and a necessary number of power amplifiers are connected depending on a required output power by switch circuits 115 to 118, and the power source is turned on only in the connected power amplifiers, while the other power amplifiers are turned off, and therefore by the lowering portion of the output power, the current consumption decreases in proportion, so that the equivalent high efficiency operation same as in the case maximum efficiency is realized.
Inventors
- 👤 Masayuki Miyaji
- 👤 Kaoru Ishida
- 👤 Hiroaki Kosugi
- 👤 Yoichi Morinaga
- 👤 Hidenobu Kato
- 👤 Takashi Enoki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:10
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/72; H03F1/00; H03F1/02; H03F1/0205; H03F1/0277; H03F3/20; H03F3/24; H04; H04B; H04B1/00; H04B1/02; H04B1/04; H03F2203/00; H03F2203/72; H03F2203/7236; H03F2203/7239; H04B1/0458; H04B1/38; H04B1/40; H04B1/403; H04B1/406; H04B2001/0408; H04B2001/045
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
168 words
A high efficiency linear power amplifier of plural
frequency bands comprising: pre-amplifying means connected to an input terminal
for receiving signals in plural frequency bands, for
amplifying the input signals of plural frequency bands, changeover means of plural frequency bands for
changing over the output of the pre-amplifying means for
issuing to any one of plural changeover terminals, and a plurality of post-amplifying blocks connected to
each one of the plural changeover terminals of the
changeover means of plural frequency bands, wherein each one of said plurality of post-amplifying
blocks comprises single frequency band matching means for
matching impedance between the output of the pre-amplifying
means and input of a below-described post-amplifying
means in a single frequency band, post-amplifying
means for amplifying the output signal of the
single frequency band matching means, post-matching means
connected to the output of the post-amplifying means for
matching the output impedance of the post-amplifying means
in a single frequency band, and output terminal for issuing
the output signal of the post-matching means.
Claim 2
Dependent Claim
73 words
A high efficiency linear power amplifier of plural
frequency bands of claim 1, wherein the output of the
pre-amplifying means is connected to the changeover means
of plural frequency bands through auxiliary matching means,
and the auxiliary matching means matches the impedance of
the inputs of the pre-amplifying means and post-amplifying
means in the operating frequency band through cooperation
with the element of the single frequency band matching
means in each frequency band.
Claim 3
Dependent Claim
51 words
A high efficiency linear power amplifier of plural
frequency bands of claim 1 or 2, wherein wide band matching
means for matching the impedance between the output of the
pre-stage and the input of the pre-amplifying means in
plural frequency bands is provided between the input
terminal and the pre-amplifying means.
Claim 4
Dependent Claim
36 words
A high efficiency linear power amplifier of plural
frequency bands of claim 2, wherein the auxiliary matching
means is a grounded capacitance or low impedance line, and
the single frequency band matching means is an inductance.
Claim 5
Dependent Claim
34 words
A high efficiency linear power amplifier of plural
frequency bands of claim 3, wherein the wide band matching
means is a combination of a set of inductance and
capacitance and a negative feedback amplifier.
Claim 6
Dependent Claim
29 words
A high efficiency linear power amplifier of plural
frequency bands of claim 1, 2, or 3, wherein at least whole
constituent elements are composed on a same semiconductor
chip.
Claim 7
Dependent Claim
44 words
A high efficiency linear power amplifier of plural
frequency bands of claim 1, wherein at least the pre-amplifying
means, changeover means of plural frequency
bands, plurality of single frequency band matching means,
and plurality of post-amplifying means are composed on a
same semiconductor chip.
Claim 8
Dependent Claim
47 words
A high efficiency linear power amplifier of plural
frequency bands of claim 2, wherein at least the pre-amplifying
means, auxiliary matching means, changeover
means of plural frequency bands, plurality of single
frequency band matching means, and plurality of post-amplifying
means are composed on a same semiconductor
chip.
Claim 9
Dependent Claim
48 words
A high efficiency linear power amplifier of plural
frequency bands of claim 3, wherein at least the wide band
matching means, pre-amplifying means, changeover means of
plural frequency bands, plurality of single frequency band
matching means, and plurality of post-amplifying means are
composed on a same semiconductor chip.
Claim 10
Dependent Claim
51 words
A high efficiency linear power amplifier of plural
frequency bands of claim 3, wherein at least the wide band
matching means, pre-amplifying means, auxiliary matching
means, changeover means of plural frequency bands,
plurality of single frequency band matching means, and
plurality of post-amplifying means are composed on a same
semiconductor chip.
Claim 11
Dependent Claim
33 words
A high efficiency linear power amplifier of plural
frequency bands of claim 1, wherein at least the pre-amplifying
means and changeover means of plural frequency
bands are composed on a same semiconductor chip.
Claim 12
Dependent Claim
36 words
A high efficiency linear power amplifier of plural
frequency bands of claim 2, wherein at least the pre-amplifying
means, auxiliary matching means, and
changeover means of plural frequency bands are composed
on a same semiconductor chip.
Claim 13
Dependent Claim
37 words
A high efficiency linear power amplifier of plural
frequency bands of claim 3, wherein at least the wide band
matching means, pre-amplifying means, and changeover
means of plural frequency bands are composed on a same
semiconductor chip.
Claim 14
Dependent Claim
40 words
A high efficiency linear power amplifier of plural
frequency bands of claim 3, wherein at least the wide band
matching means, pre-amplifying means, auxiliary matching
means, and changeover means of plural frequency bands are
composed on a same semiconductor chip.
Claim 15
Dependent Claim
206 words
A high efficiency power amplifier comprising at
least two power amplifiers, at least two power source
changeover means for turning on or off the power source
of each one of the power amplifiers, a first common
terminal, input branching means having a switching
function between the input terminals of each one of the
power amplifiers from the first common terminal, first
impedance converting means for converting the impedance
of the first common terminal, a second common terminal,
output selecting means having a switching function between
the output terminals of each one of the power amplifiers
from the second common terminal, second impedance
converting means for converting the impedance of the
second common terminal, and control means for controlling
the input branching means and output selecting means
depending on a required output power to connect a necessary
number of the power amplifiers, converting the input
impedance of the first common terminal by the first
impedance converting means depending on the connection
state of the power amplifiers, converting the impedance
of the second common terminal by the second impedance
converting means depending on the connection state of the
power amplifiers, turning on those power source changeover
means corresponding to the connected power amplifiers, and
turning off the others.
Claim 16
Dependent Claim
238 words
A high efficiency power amplifier comprising at
least two power amplifiers, each transmission line having
one end connected in series to the output terminal of each
one of the power amplifiers, and other end connected
commonly, at least two power source changeover means for
turning on or off the power source of each one of the power
amplifiers, a common terminal, input branching means
having a switching function between the input terminals
of each one of the power amplifiers from the common
terminal, first impedance converting means for converting
the impedance of the common terminal, second impedance
converting means for converting the impedance, being
connected to the common junction of the transmission line,
and control means for controlling the input branching
means depending on a required output power to connect a
necessary number of the power amplifiers, converting the
input impedance of the common terminal by the first
impedance converting means depending on the connection
state of the power amplifiers, converting the impedance
by the second impedance converting means depending on the
connection state of the power amplifiers, turning on those
power source changeover means corresponding to the
connected power amplifiers, and turning off the others,
wherein the impedance as seen from the output side of each
transmission line to the input side when the power source
changeover means of each one of the power amplifiers is
turned off is set so as to be a high impedance.
Claim 17
Dependent Claim
148 words
A high efficiency power amplifier comprising a
power amplifier, a transmission line, power source
changeover means for turning on or off the bias of the power
amplifier, a first common terminal, input branching means
for changing over the input terminal of the power amplifier
and the input terminal of the transmission line from the
first common terminal, a second common terminal, output
selecting means for changing over the output terminal of
the power amplifier and the output terminal of the
transmission line from the second common terminal, and
control means for controlling the input branching means
and output selecting means to connect the power amplifier,
and turning on the power source changeover means, at the
time of high output, or controlling the input branching
means and output selecting means to connect the
transmission line, and turning off the power source
changeover means, at the time of low output.
Claim 18
Dependent Claim
259 words
A high efficiency power amplifier comprising at
least two power amplifiers, a transmission line, at least
two power source changeover means for turning on or off
the power source of each one of the power amplifiers, a
first common terminal, input branching means having a
switching function between the input terminal of each one
of the power amplifiers and the input terminal of the
transmission line from the first common terminal, first
impedance converting means for converting the impedance
of the first common terminal, a second common terminal,
output selecting means having a switching function between
the output terminal of each one of the power amplifiers
and the output terminal of the transmission line from the
second common terminal, second impedance converting means
for converting the impedance of the second common terminal,
and control means for controlling the input branching
means and output selecting means depending on a required
output power to connect a necessary number of the power
amplifiers, converting the input impedance of the first
common terminal by the first impedance converting means
depending on the connection state of the power amplifiers,
converting the impedance of the second common terminal by
the second impedance converting means depending on the
connection state of the power amplifiers, turning on those
power source changeover means corresponding to the
connected power amplifiers, and turning off the others,
or when not necessary to amplify, controlling the input
branching means and output selecting means to connect the
transmission line, and turning off all of the power source
changeover means of the power amplifiers.
Claim 19
Dependent Claim
215 words
A high efficiency power amplifier comprising a
power amplifier, a first transmission line, a second
transmission line having one end connected in series to
the output terminal of the power amplifier, and other end
connected commonly with the output end of the first
transmission line, power source changeover means for
turning on or off the bias of the power amplifier, a common
terminal, input branching means for changing over the
input terminal of the power amplifier and the input
terminal of the first transmission line from the common
terminal, and control means for controlling the input
branching means to connect the power amplifier, and
turning on the power source changeover means, at the time
of high output, or controlling the input branching means
to connect the first transmission line, and turning off
the power source changeover means, at the time of low
output, wherein the impedance as seen from the output side
of second transmission line to the input side when the
power source changeover means of the power amplifier is
turned off is set so as to be a high impedance, and the
impedance as seen from the output side of the first
transmission line to the input side when the first
transmission line is cut off is set to be a high impedance.
Claim 20
Dependent Claim
330 words
A high efficiency power amplifier comprising at
least two power amplifiers, a first transmission line,
each second transmission line having one end connected in
series to the output terminal of each one of the power
amplifiers and other end connected commonly to the output
end of the first transmission line, at least two power
source changeover means for turning on or off the power
source of each one of the power amplifiers, a common
terminal, input branching means having a switching
function between the input terminal of each one of the
power amplifiers and the input terminal of the first
transmission line from the common terminal, a first
impedance converting means for converting the impedance
of the common terminal, second impedance converting means
for converting the impedance, being connected at the
common junction of the first and second transmission lines,
and control means for controlling the input branching
means depending on a required output power to connect a
necessary number of the power amplifiers, converting the
input impedance of the common terminal by the first
impedance converting means depending on the connection
state of the power amplifiers, converting the impedance
by the second impedance converting means depending on the
connection state of the power amplifiers, turning on those
power source changeover means corresponding to the
connected power amplifiers, and turning off the others,
or when not necessary to amplify, controlling the input
branching means to connect the first transmission line,
and turning off all of the power source changeover means
of the power amplifiers, wherein the impedance as seen from
the output side of each second transmission line to the
input side when the power source changeover means of each
one of the power amplifiers is turned off is set so as to
be a high impedance, and the impedance as seen from the
output side of the first transmission line to the input
side when the first transmission line is cut off is set
to be a high impedance.
Claim 21
Dependent Claim
29 words
A high efficiency power amplifier of any one of
claims 15, 16, 18, and 20, wherein the impedance converting
means has a transformer for changing over the turn ratio.
Claim 22
Dependent Claim
32 words
A high efficiency power amplifier of any one of
claims 15, 16, 18, and 20, wherein at least one of the power
amplifiers is a power amplifier having a different output
power.
Claim 23
Dependent Claim
46 words
A high efficiency linear power amplifier of plural
frequency bands using the high efficiency power amplifier
of any of one claims 15 to 22, as the plural post-stage
amplifying blocks in the high efficiency linear power
amplifier of plural frequency bands of claim 1 or 2.
Claim 24
Dependent Claim
36 words
A wireless appliance comprising the high
efficiency linear power amplifier of plural frequency
bands of any one of claims 1 to 14, or the high efficiency
power amplifier of any one of claims 15 to 23.
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