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Document Type and Number:
Japanese Patent JP6680661
Kind Code:
PROBLEM TO BE SOLVED: To suppress variations in the output power of a pulse transmitter by generating an optimum envelopment signal without being affected by variations in process.SOLUTION: An envelop circuit includes: a capacitor 1 provided between an output terminal and the ground of the envelop circuit; a variable current source 2 capable of adjusting an electric current; an analog circuit 3 which is provided between the variable current source 2 and the output terminal of the envelop circuit and which is a switch for charging the capacitor 1; a digital control circuit 4 for controlling ON/OFF operations of an analog circuit 3 according to transmission data Data; a DA converter 5; and a current adjustment circuit 6 for adjusting an electric current of the variable current source 2 so that an inclination of an envelop signal Vout output from an output terminal of the envelop circuit and a value of a reference signal output from the DA converter 5 meet each other.SELECTED DRAWING: Figure 1

Musa Ahmad
Kenichi Matsunaga
Shoichi Oshima
Toshihiko Kondo
Morimura Hiroki
Application Number:
Publication Date:
April 15, 2020
Filing Date:
October 20, 2016
Export Citation:
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Nippon Telegraph and Telephone Corporation
International Classes:
H04B1/04; H03K4/50; H04B1/717
Domestic Patent References:
Foreign References:
Attorney, Agent or Firm:
Shigeki Yamakawa
Yuzo Koike
Masaki Yamakawa