[go: up one dir, main page]

GB201208898D0 - Attenuation circuit - Google Patents

Attenuation circuit

Info

Publication number
GB201208898D0
GB201208898D0 GBGB1208898.5A GB201208898A GB201208898D0 GB 201208898 D0 GB201208898 D0 GB 201208898D0 GB 201208898 A GB201208898 A GB 201208898A GB 201208898 D0 GB201208898 D0 GB 201208898D0
Authority
GB
United Kingdom
Prior art keywords
stage
attenuation
vin
resistors
resistor
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.)
Granted
Application number
GBGB1208898.5A
Other versions
GB2504060B (en
GB2504060A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lime Microsystems Ltd
Original Assignee
Lime Microsystems Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lime Microsystems Ltd filed Critical Lime Microsystems Ltd
Priority to GB1208898.5A priority Critical patent/GB2504060B/en
Publication of GB201208898D0 publication Critical patent/GB201208898D0/en
Publication of GB2504060A publication Critical patent/GB2504060A/en
Application granted granted Critical
Publication of GB2504060B publication Critical patent/GB2504060B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • H04B2001/305—Circuits for homodyne or synchrodyne receivers using DC offset compensation techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Attenuators (AREA)

Abstract

An attenuation circuit, for attenuating a signal whilst providing a controllable DC offset, comprising an input Vin+, Vin-, an output Vout+, Vout-, a common rail VCm and a plurality of attenuation stages 1, 2, 3, 4. Each attenuation stage comprises a switch 8a, 8b, 8c, 8d and a first resistor 5a, 5b, 5c, 5d. First resistors 5a, 5b, 5c are connected at junctions 6a, 6b, 6c of each stage 1, 2, 3 in series to the first resistor 5b, 5c, 5d of a subsequent one of the attenuation stages 2, 3, 4. First resistor 5d of the terminal attenuation stage 4 is connected at a junction 6d of that stage to the output Vout+, Vout-. Second resistors 7a, 7b, 7c, 7d are connected between the junctions 6a, 6b, 6c, 6d of each attenuation stage 1, 2, 3, 4 and the switches 8a, 8b, 8c, 8d. The switches 8a, 8b, 8c, 8d are arranged to selectively connect the second resistors 7a, 7b, 7c, 7d to either the input Vin+, Vin- or the common rail VCm. Each attenuation stage 1, 2, 3, 4 is provided with a current source 10a, 10b, 10c, 10d arranged to selectively apply a constant current signal to the junction 6a, 6b, 6c, 6d of that stage 1, 2, 3, 4.
GB1208898.5A 2012-05-21 2012-05-21 Attenuation circuit Active GB2504060B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1208898.5A GB2504060B (en) 2012-05-21 2012-05-21 Attenuation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1208898.5A GB2504060B (en) 2012-05-21 2012-05-21 Attenuation circuit

Publications (3)

Publication Number Publication Date
GB201208898D0 true GB201208898D0 (en) 2012-07-04
GB2504060A GB2504060A (en) 2014-01-22
GB2504060B GB2504060B (en) 2019-01-09

Family

ID=46546397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1208898.5A Active GB2504060B (en) 2012-05-21 2012-05-21 Attenuation circuit

Country Status (1)

Country Link
GB (1) GB2504060B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339021A (en) * 1993-02-24 1994-08-16 Analog Devices, Inc. Cascaded resistance ladder attenuator network
FR2749992A1 (en) * 1996-06-14 1997-12-19 Philips Electronics Nv DIGITALLY CONTROLLED GAIN AMPLIFIER AND CAMERA IMPLEMENTING SUCH AMPLIFIER
US7098738B2 (en) * 2003-12-24 2006-08-29 Broadcom Corporation Fine step and large gain range programmable gain amplifier
US7449976B1 (en) * 2007-03-15 2008-11-11 Northrop Grumman Systems Corporation Power efficient PIN attenuator drive circuit
US7956680B2 (en) * 2008-07-07 2011-06-07 Mediatek Inc. Low-noise DC offset calibration circuit and related receiver stage

Also Published As

Publication number Publication date
GB2504060B (en) 2019-01-09
GB2504060A (en) 2014-01-22

Similar Documents

Publication Publication Date Title
GB201200423D0 (en) Photovoltaic module
WO2016040688A3 (en) High linearity cmos rf power amplifiers in wifi applications
GB2544202A (en) Switched mode converter with low-voltage linear mode
EP3906615A4 (en) Voltage protection circuit to prevent power amplifier burnout, and electronic device having the same
WO2014053911A3 (en) Analog to digital converter including a pre-charge circuit
WO2010099349A8 (en) Low dissipation amplifier
EP2709276A3 (en) Signal Amplification Circuit and Signal Amplification Determination Circuit Including the Signal Amplification Circuit
WO2014110289A3 (en) Programmably configured switchmode audio amplifier
TW200801882A (en) Bandgap reference circuit
IN2015DN02761A (en)
WO2014059437A3 (en) Switched capacitor circuits having level-shifting buffer amplifiers, and associated methods
WO2014164309A3 (en) Tracking power supply with increased boost capability
WO2008097932A3 (en) Die apparatus having configurable input/output and control method thereof
WO2015040517A3 (en) Compact power conversion device with continuous output regulation range
WO2013063570A3 (en) Level shifter
IN2014CN00596A (en)
EP2424109A3 (en) Multimode frontend circuit
EP2293444A3 (en) High voltage switch in low voltage process
CN204229198U (en) The AD harvester that a kind of hyperchannel is multiplexing
MY194220A (en) Power converter
EP2688203A3 (en) Multiple-output transconductance amplifier based instrumentation amplifier
US9350306B2 (en) Amplification circuit, amplification device, AFE circuit, and signal processing system
GB201208898D0 (en) Attenuation circuit
EP2393112A3 (en) Inductive circuit arrangement
CN109906550A (en) It is suitable for the high speed current comparator of millimicro power circuit design