GB1362618A - Controllable four-terminal attenuator - Google Patents
Controllable four-terminal attenuatorInfo
- Publication number
- GB1362618A GB1362618A GB1607872A GB1607872A GB1362618A GB 1362618 A GB1362618 A GB 1362618A GB 1607872 A GB1607872 A GB 1607872A GB 1607872 A GB1607872 A GB 1607872A GB 1362618 A GB1362618 A GB 1362618A
- Authority
- GB
- United Kingdom
- Prior art keywords
- attenuator
- diodes
- arm
- series
- shunt
- 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/24—Frequency- independent attenuators
- H03H7/25—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable
- H03H7/253—Frequency- independent attenuators comprising an element controlled by an electric or magnetic variable the element being a diode
Landscapes
- Electron Tubes For Measurement (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Attenuators (AREA)
Abstract
1362618 Controllable attenuators A KATHREINSNR 7 April 1972 [6 May 1971] 16078/72 Heading H3U A four terminal attenuator comprises a bridged T network, whose shunt and by-pass arms contain respectively at least one silicon or germanium diode 1, 2, receiving, via chokes 8, 9; 10, 11, or directly, Fig. 3 (not shown), a D.C. bias voltage whose variation controls the attenuator characteristic. Resistors 3 and 4 are both of a value equal to the characteristic impedance of lines to and from the attenuator. For higher cut-off frequency, the by-pass arm may have three diodes in series (21-23), Fig. 2 (not shown), for reduced capacitance, the shunt arm having diodes (24-26) in parallel for reduced inductance. To reduce the intermodulation level, a full-wave bridge rectifier diode array may be used in each path, Fig. 3 (not shown), or each arm may contain an antiparallel configuration of a pair of diodes, each in series with a respective capacitance, Fig. 4 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19712122528 DE2122528B2 (en) | 1971-05-06 | 1971-05-06 | Damping four-pole for alternating voltages, especially for high-frequency voltages |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1362618A true GB1362618A (en) | 1974-08-07 |
Family
ID=5807101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1607872A Expired GB1362618A (en) | 1971-05-06 | 1972-04-07 | Controllable four-terminal attenuator |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2122528B2 (en) |
| FR (1) | FR2135656B1 (en) |
| GB (1) | GB1362618A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2123653A (en) * | 1982-05-25 | 1984-02-01 | Sony Corp | Remote control apparatus |
| EP1009163A1 (en) * | 1998-12-10 | 2000-06-14 | Alps Electric Co., Ltd. | Digital television signal receiving tuner |
| CN112688653A (en) * | 2020-12-22 | 2021-04-20 | 成都美数科技有限公司 | Bipolar high-power adjustable attenuator |
| EP4187786A1 (en) * | 2021-11-30 | 2023-05-31 | Nxp B.V. | An attenuation circuit |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5140200A (en) * | 1990-07-17 | 1992-08-18 | General Instrument Corporation | Pin diode attenuator |
| US5656978A (en) * | 1995-12-11 | 1997-08-12 | Harmonic Lightwaves | Control circuit and method for direct current controlled attenuator |
| FR2763763B1 (en) * | 1997-05-23 | 1999-07-30 | Trt Lucent Technologies | ELECTRONICALLY CONTROLLED VARIABLE ATTENUATOR |
-
1971
- 1971-05-06 DE DE19712122528 patent/DE2122528B2/en active Pending
-
1972
- 1972-04-07 GB GB1607872A patent/GB1362618A/en not_active Expired
- 1972-05-05 FR FR7216129A patent/FR2135656B1/fr not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2123653A (en) * | 1982-05-25 | 1984-02-01 | Sony Corp | Remote control apparatus |
| EP1009163A1 (en) * | 1998-12-10 | 2000-06-14 | Alps Electric Co., Ltd. | Digital television signal receiving tuner |
| CN112688653A (en) * | 2020-12-22 | 2021-04-20 | 成都美数科技有限公司 | Bipolar high-power adjustable attenuator |
| CN112688653B (en) * | 2020-12-22 | 2023-03-24 | 成都美数科技有限公司 | Bipolar high-power adjustable attenuator |
| EP4187786A1 (en) * | 2021-11-30 | 2023-05-31 | Nxp B.V. | An attenuation circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2122528A1 (en) | 1972-11-16 |
| DE2122528B2 (en) | 1975-07-03 |
| FR2135656A1 (en) | 1972-12-22 |
| FR2135656B1 (en) | 1973-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1084185A (en) | Transformerless two-wire/four-wire hybrid with dc sourcing capability | |
| US3568100A (en) | Automatic equalizer for digital transmission systems | |
| US2497693A (en) | Bilateral clipper circuit | |
| JPS5784149A (en) | Semiconductor integrated circuit device | |
| US4016516A (en) | Reflective signal controller | |
| GB1362618A (en) | Controllable four-terminal attenuator | |
| US3346805A (en) | Variable tau-network attenuator using varactor diodes | |
| US4215280A (en) | Phase responsive frequency detector | |
| GB1410380A (en) | Tone control circuit | |
| US3078377A (en) | Limiting amplifier employing non-saturating transistors for providing inphase squarewave output from distorted wave input | |
| GB737526A (en) | Stabilized electrical networks | |
| US3582681A (en) | Variable loss device | |
| US2911597A (en) | Modulation system | |
| US3566162A (en) | Gating circuit | |
| US3307044A (en) | Apparatus for suppressing the appearance of transient responses or spikes | |
| US4063187A (en) | Equalizer circuit | |
| US2728053A (en) | Transmission network using transistors | |
| US3289107A (en) | Compandor system employing symmetrical varistors | |
| US3843943A (en) | Coupling circuit for telephone line and the like | |
| US3599104A (en) | Logarithmic amplifier of extended dynamic range | |
| US3569846A (en) | Frequency discriminator apparatus | |
| US3153732A (en) | Pulse sampling circuit employing diode pair connected to tunnel circuit | |
| US4373118A (en) | Battery feed circuit | |
| US3221272A (en) | Variable-capacitance diode modulator | |
| US3448400A (en) | Arrangement for varying the feedback of an amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |