JPH02149124U - - Google Patents
Info
- Publication number
- JPH02149124U JPH02149124U JP5845389U JP5845389U JPH02149124U JP H02149124 U JPH02149124 U JP H02149124U JP 5845389 U JP5845389 U JP 5845389U JP 5845389 U JP5845389 U JP 5845389U JP H02149124 U JPH02149124 U JP H02149124U
- Authority
- JP
- Japan
- Prior art keywords
- power
- switching
- power supply
- amplification
- commercial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Amplifiers (AREA)
Description
図は本考案の一実施例の電気回路図である。
1…信号源、2…電力増幅部、3…スイツチン
グ部、A…商用交流電源供給部(商用交流電源)
、BT…電池電源、SW…電源選択スイツチ(電
源選択部)、R3…帰還抵抗(増幅率決定用素子
)。
The figure is an electrical circuit diagram of an embodiment of the present invention. 1...Signal source, 2...Power amplification unit, 3...Switching unit, A...Commercial AC power supply unit (commercial AC power supply)
, BT...Battery power supply, SW...Power supply selection switch (power supply selection section), R3...Feedback resistor (amplification factor determining element).
Claims (1)
駆動用電圧を、電源選択部の切換操作により商用
交流電源または電池電源から択一的に供給するよ
うになつた電力増幅回路において、前記電源選択
部の切り換え動作に連動してオン、オフされるス
イツチング部を設けるとともに、このスイツチン
グ部により、前記電力増幅部の増幅率決定用素子
を、前記電池電源の選択時に前記商用交流電源の
選択時に対し増幅率が小さくなるよう切り換え接
続する構成としたことを特徴とする電力増幅回路
。 In the power amplification circuit, the voltage for driving the power amplification part that amplifies the input signal from the signal source is selectively supplied from the commercial AC power supply or the battery power supply by switching operation of the power supply selection part. A switching section is provided which is turned on and off in conjunction with the switching operation of the power amplifying section, and this switching section controls the amplification factor determining element of the power amplifying section to be set to a different value when the battery power source is selected than when the commercial AC power source is selected. A power amplifier circuit characterized by having a configuration in which switching connections are made so that the amplification factor is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5845389U JPH02149124U (en) | 1989-05-19 | 1989-05-19 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5845389U JPH02149124U (en) | 1989-05-19 | 1989-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02149124U true JPH02149124U (en) | 1990-12-19 |
Family
ID=31584076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5845389U Pending JPH02149124U (en) | 1989-05-19 | 1989-05-19 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02149124U (en) |
-
1989
- 1989-05-19 JP JP5845389U patent/JPH02149124U/ja active Pending