DE2159095C3 - Multi-stage amplifier with adjustable gain with low input and output resistance - Google Patents
Multi-stage amplifier with adjustable gain with low input and output resistanceInfo
- Publication number
- DE2159095C3 DE2159095C3 DE19712159095 DE2159095A DE2159095C3 DE 2159095 C3 DE2159095 C3 DE 2159095C3 DE 19712159095 DE19712159095 DE 19712159095 DE 2159095 A DE2159095 A DE 2159095A DE 2159095 C3 DE2159095 C3 DE 2159095C3
- Authority
- DE
- Germany
- Prior art keywords
- transistor
- amplifier
- emitter
- base
- collector
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/08—Arrangements for combining channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/08—Arrangements for combining channels
- H04J1/085—Terminal station; Combined modulator and demodulator circuits
Claims (1)
gangswiderstand durch ein Parallel-Rückkopplungsnetzwerk erteicht wird. Die Rückkopplung erfolgt dabei
über alle Stufen des monolithisch ausgeführten aktiven
Teiles des Verstärkers hinweg.From DE-OS 19 12 609 a converter amplifier has become known, the lower on and off 45
input resistance is measured by a parallel feedback network. The feedback takes place
across all stages of the monolithically executed active
Part of the amplifier away.
dadurch einstellen,, daß der Widerstand des Rückkopplungsnetzwerkes verändert wird. Eine solche Veränderung würde jedoch gleichzeitig zu einer unerwünschten
Veränderung des Eingangs- und Ausgangswiderstandes
führen. Die gleiche Eigenschaft weist auch die Verstär- 55
kerschaltung auf, die in der DE-OS 17 62 440 beschrieben ist. Darüber hinaus neigen Verstärker, bei denen die
Rückkopplung über alle Stufen erfolgt, zur Instabilität.The gain of this amplifier could be z. B. 50
adjust by changing the resistance of the feedback network. However, such a change would also be undesirable
Change in input and output resistance
to lead. The reinforcement 55
kerschaltung, which is described in DE-OS 17 62 440. In addition, amplifiers tend to be where the
Feedback takes place across all stages, leading to instability.
oder Ausgängen dienen auch die Verstärkerschaltun· so
gen, die in der US-PS 33 32 038 beschrieben sind. Diese
Verstärkerschaltungen haben entweder niederohmige
Eingangs- oder niederohmige Ausgangswiderstände; sie
können z. B. zur Frequenz-Multiplexbildung oder zur
Frequenz-Demultiplexbildung am Anfang oder Ende ei- 65
ner Übertragungsleitung eingesetzt werden.The decoupling of parallel inputs
or outputs are also used by the amplifier circuits
genes described in US Pat. No. 3,332,038. These
Amplifier circuits either have low resistance
Input or low output resistance; she
can e.g. B. for frequency multiplexing or for
Frequency demultiplexing at the beginning or end of a 65
be used in a transmission line.
angegeben sind, enthalten diese u. a. Transistoren undSo much for switching examples in the cited prior art
are given, they contain transistors and, among other things
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712159095 DE2159095C3 (en) | 1971-11-29 | 1971-11-29 | Multi-stage amplifier with adjustable gain with low input and output resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712159095 DE2159095C3 (en) | 1971-11-29 | 1971-11-29 | Multi-stage amplifier with adjustable gain with low input and output resistance |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2159095A1 DE2159095A1 (en) | 1973-05-30 |
DE2159095B2 DE2159095B2 (en) | 1977-06-16 |
DE2159095C3 true DE2159095C3 (en) | 1985-01-24 |
Family
ID=5826455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712159095 Expired DE2159095C3 (en) | 1971-11-29 | 1971-11-29 | Multi-stage amplifier with adjustable gain with low input and output resistance |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2159095C3 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4268798A (en) * | 1977-12-19 | 1981-05-19 | Motorola, Inc. | High performance summing amplifier |
US4321553A (en) * | 1979-03-21 | 1982-03-23 | Ford Aerospace & Communications Corp. | Wide bandwidth low distortion amplifier |
NL7903663A (en) * | 1979-05-10 | 1980-11-12 | Philips Nv | AMPLIFIER FOR APPLICATION IN A LINE CIRCUIT. |
-
1971
- 1971-11-29 DE DE19712159095 patent/DE2159095C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2159095A1 (en) | 1973-05-30 |
DE2159095B2 (en) | 1977-06-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8227 | New person/name/address of the applicant |
Free format text: FELTEN & GUILLEAUME FERNMELDEANLAGEN GMBH, 8500 NUERNBERG, DE |
|
8281 | Inventor (new situation) |
Free format text: SCHEMMEL, HANS-ROBERT, DIPL.-ING., 8500 NUERNBERG, DE |
|
C3 | Grant after two publication steps (3rd publication) | ||
8339 | Ceased/non-payment of the annual fee |