Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits

Bram Nauta (Inventor)

    Research output: Patent

    9 Downloads (Pure)

    Abstract

    An electrically controllable oscillator circuit (30) comprises two balanced transconductance circuits (G1, G2), each including transistor pairs arranged as inverters (Inv14) and as resistors (Inv5-6). The oscillation frequency (f) and the quality factor (Q) of the oscillator circuit (30) are controlled by means of a single control signal provided by a combined control circuit (Inv7, Dif, IM1, IM2). The current mirror circuit (IM1, IM2) and a differential pair (Dif) derived the control signal for adjusting the quality factor (Q) from a resistor-connected further transistor pair (Inv7) connected to the control signal for adjusting the frequency (f). The quality factor of an electrically controllable filter arangement including similar transconductance circuits (G-3-9) is adjusted by means of the control signal generated by the control circuit via a buffer circuit (B) and a low-pass circuit (C3).
    Original languageUndefined
    Patent numberUS005117205A
    Priority date1/05/90
    Publication statusPublished - 26 May 1992

    Keywords

    • IR-102653
    • EWI-27526

    Cite this

    Nauta, Bram (Inventor). / Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits. Patent No.: US005117205A.
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    title = "Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits",
    abstract = "An electrically controllable oscillator circuit (30) comprises two balanced transconductance circuits (G1, G2), each including transistor pairs arranged as inverters (Inv14) and as resistors (Inv5-6). The oscillation frequency (f) and the quality factor (Q) of the oscillator circuit (30) are controlled by means of a single control signal provided by a combined control circuit (Inv7, Dif, IM1, IM2). The current mirror circuit (IM1, IM2) and a differential pair (Dif) derived the control signal for adjusting the quality factor (Q) from a resistor-connected further transistor pair (Inv7) connected to the control signal for adjusting the frequency (f). The quality factor of an electrically controllable filter arangement including similar transconductance circuits (G-3-9) is adjusted by means of the control signal generated by the control circuit via a buffer circuit (B) and a low-pass circuit (C3).",
    keywords = "IR-102653, EWI-27526",
    author = "Bram Nauta",
    year = "1992",
    month = "5",
    day = "26",
    language = "Undefined",
    type = "Patent",
    note = "US005117205A",

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    Nauta, B 1992, Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits, Patent No. US005117205A.

    Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits. / Nauta, Bram (Inventor).

    Patent No.: US005117205A.

    Research output: Patent

    TY - PAT

    T1 - Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits

    AU - Nauta, Bram

    PY - 1992/5/26

    Y1 - 1992/5/26

    N2 - An electrically controllable oscillator circuit (30) comprises two balanced transconductance circuits (G1, G2), each including transistor pairs arranged as inverters (Inv14) and as resistors (Inv5-6). The oscillation frequency (f) and the quality factor (Q) of the oscillator circuit (30) are controlled by means of a single control signal provided by a combined control circuit (Inv7, Dif, IM1, IM2). The current mirror circuit (IM1, IM2) and a differential pair (Dif) derived the control signal for adjusting the quality factor (Q) from a resistor-connected further transistor pair (Inv7) connected to the control signal for adjusting the frequency (f). The quality factor of an electrically controllable filter arangement including similar transconductance circuits (G-3-9) is adjusted by means of the control signal generated by the control circuit via a buffer circuit (B) and a low-pass circuit (C3).

    AB - An electrically controllable oscillator circuit (30) comprises two balanced transconductance circuits (G1, G2), each including transistor pairs arranged as inverters (Inv14) and as resistors (Inv5-6). The oscillation frequency (f) and the quality factor (Q) of the oscillator circuit (30) are controlled by means of a single control signal provided by a combined control circuit (Inv7, Dif, IM1, IM2). The current mirror circuit (IM1, IM2) and a differential pair (Dif) derived the control signal for adjusting the quality factor (Q) from a resistor-connected further transistor pair (Inv7) connected to the control signal for adjusting the frequency (f). The quality factor of an electrically controllable filter arangement including similar transconductance circuits (G-3-9) is adjusted by means of the control signal generated by the control circuit via a buffer circuit (B) and a low-pass circuit (C3).

    KW - IR-102653

    KW - EWI-27526

    M3 - Patent

    M1 - US005117205A

    ER -

    Nauta B, inventor. Electrically controllable oscillator circuit, and electrically controllable filter arrangement comprising said circuits. US005117205A. 1992 May 26.

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