US 11,955,937 B2
Amplification device and transmission/reception system
Daisuke Hayashi, Tokyo (JP); Norihito Hamada, Tokyo (JP); and Shigeo Kawasaki, Tokyo (JP)
Assigned to KODEN ELECTRONICS CO., LTD., Tokyo (JP)
Filed by Koden Electronics Co., Ltd., Tokyo (JP)
Filed on Jan. 22, 2021, as Appl. No. 17/155,464.
Claims priority of application No. 2020-013786 (JP), filed on Jan. 30, 2020.
Prior Publication US 2021/0242841 A1, Aug. 5, 2021
Int. Cl. H03F 1/30 (2006.01); H03F 1/02 (2006.01); H03F 3/24 (2006.01); H04B 1/02 (2006.01); H04B 1/06 (2006.01)
CPC H03F 3/245 (2013.01) [H03F 1/02 (2013.01); H04B 1/02 (2013.01); H04B 1/06 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An amplification device comprising:
a pulse signal acquisition part including
an input port configured to receive a desired pulse signal to be amplified, and;
an output port configured to output the desired pulse signal;
a dummy signal generation part that generates a dummy signal including
an output port configured to output the generated dummy signal, and
a dummy signal generating circuit configured to
generate the dummy signal with a frequency different from the frequency of the received desired pulse signal, or generate the dummy signal with a modulation different from the modulation of the received desired pulse signal, and
generate the dummy signal with a duration such that when the dummy signal is added to the start and end of the received desired pulse signal to produce a composite signal, the power of the composite signal is constant;
a combination part that adds the dummy signal before the start of and after the end of the desired pulse signal and outputs a composite signal including
an input port configured to receive the generated dummy signal from the output port of the dummy signal generation part and to receive the desired pulse signal from the output port of the pulse signal acquisition part,
a circuit configured to add the dummy signal before the start of and after the end of the desired pulse signal to produce a composite signal, and
an output port configured to output the composite signal;
an amplifier that amplifies the composite signal and outputs an amplified composite signal including
an input port configured to receive the composite signal from the output port of the combination part,
an amplifier circuit configured to amplify the received composite signal, and
an output port configured to output the amplified composite signal; and
a separation part that extracts an amplified desired pulse signal that is a signal resulting from amplification of the desired pulse signal, from the amplified composite signal and outputs the amplified desired pulse signal, including
an input port configured to receive the amplified composite signal from the output port of the amplifier, the amplified composite signal including an amplified desired pulse signal,
an extraction circuit configured to extract the amplified desired pulse signal from the amplified composite signal, the extraction circuit including
a frequency-based filter circuit configured to extract the amplified desired pulse signal based on the frequency of the amplified desired pulse signal, or
a modulation-based extracting circuit configured to extract the amplified desired pulse signal based on the modulation of the amplified desired pulse signal, and
an output port configured to output the extracted amplified desired pulse signal,
wherein the power of the composite signal is constant and is a power that causes the amplification part to operate nonlinearly.