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    Differential amplifiers
    1.
    发明授权
    Differential amplifiers 有权

    公开(公告)号：US10177725B2

    公开(公告)日：2019-01-08

    申请号：US15536242

    申请日：2015-12-14

    Applicant: NORDIC SEMICONDUCTOR ASA

    Inventor： Phil Corbishley

    IPC: H03F3/45

    Abstract: A differential amplifier comprises: a long tailed pair transistor configuration comprising a differential pair of transistors and a tail transistor; and a replica circuit configured to vary a feedback current in the replica circuit to match a replica voltage to a reference voltage, wherein varying the feedback current in the replica circuit provides a bias voltage to the tail transistor in the long tailed pair which controls a tail current through the tail transistor to determine a common mode voltage in the long tailed pair.

    Start-up circuit arranged to initialize a circuit portion
    6.
    发明授权
    Start-up circuit arranged to initialize a circuit portion 有权

    公开(公告)号：US10095260B2

    公开(公告)日：2018-10-09

    申请号：US15736763

    申请日：2016-06-16

    Applicant: Nordic Semiconductor ASA

    Inventor： Phil Corbishley ,  Sebastian Ioan Ene

    IPC: G05F3/26 ,  G05F3/30

    Abstract: A start-up circuit arranged to initialize a circuit portion with a zero stable point and a non-zero stable point. The start-up circuit includes: a capacitive voltage divider including a first capacitor and a second capacitor that generate a divider bias voltage at a divider node; a differential amplifier including first and second amplifier inputs and an amplifier output connected to the divider node; a first driver transistor with its gate terminal connected to the divider node, and its drain terminal connected to a first start-up output and the first amplifier input; and a second driver transistor with its gate terminal connected to the divider node, and its drain terminal connected to a second start-up output and the second amplifier input. The differential amplifier controls the divider bias voltage and drives the circuit portion to the non-zero stable point.

    START-UP CIRCUITS
    7.
    发明申请
    START-UP CIRCUITS 审中-公开

    公开(公告)号：US20180188764A1

    公开(公告)日：2018-07-05

    申请号：US15736763

    申请日：2016-06-16

    Applicant: Nordic Semiconductor ASA

    Inventor： Phil Corbishley ,  Sebastian Ioan Ene

    IPC: G05F3/26

    CPC classification number: G05F3/262 ,  G05F3/30

    Abstract: A start-up circuit (2) arranged to initialise a circuit portion (4) with a zero stable point (200) and a non-zero stable point (202). The start-up circuit comprises: a capacitive voltage divider including a first capacitor (16) and a second capacitor (18) that generate a divider bias voltage at a divider node (48); a differential amplifier including first and second amplifier inputs (20, 22) and an amplifier output connected to the divider node; a first driver transistor (12) with its gate terminal connected to the divider node, and its drain terminal connected to a first start-up output and the first amplifier input; and a second driver transistor (14) with its gate terminal connected to the divider node, and its drain terminal connected to a second start-up output and the second amplifier input. The differential amplifier controls the divider bias voltage and drives the circuit portion to the non-zero stable point.

    Packet-based radio receiver with automatic gain control
    9.
    发明授权
    Packet-based radio receiver with automatic gain control 有权

    公开(公告)号：US10177730B2

    公开(公告)日：2019-01-08

    申请号：US15535947

    申请日：2015-12-14

    Applicant: Nordic Semiconductor ASA

    Inventor： Phil Corbishley

    IPC: H04B1/06 ,  H04B7/00 ,  H03G3/30 ,  H04B17/318

    Abstract: A packet-based radio receiver (10) comprises an automatic gain control system (17) and a signal-level detector (18, 19, 20) for monitoring an analog signal derived from radio signals received by the radio receiver. The signal-level detector (18, 19, 20) comprises a binary memory cell (22, 24) and a monitoring system. The monitoring system comprises a comparator (21, 23) arranged to receive a reference voltage at a first input and the analog signal at a second input. The monitoring system is arranged to (i) continuously monitor the voltage of the analog signal, (ii) detect when the monitored signal exceeds the reference voltage, and (iii) store a predetermined binary value in the memory cell (22, 24) in response to such a detection. The automatic gain control system (17) is arranged to control the gain of a variable-gain component (12, 13, 14) of the radio receiver in dependence on the contents of the binary memory cell (22, 24).

    Active RC filters
    10.
    发明授权
    Active RC filters 有权

    公开(公告)号：US10153742B2

    公开(公告)日：2018-12-11

    申请号：US15536504

    申请日：2015-12-14

    Applicant: Nordic Semiconductor ASA

    Inventor： Phil Corbishley

    IPC: H03F3/45

    Abstract: An operational amplifier comprises: a first amplifier stage 4 comprising a first differential pair of transistors 8, 10 arranged to receive and amplify a differential input signal 18, 20 thereby providing a first differential output signal 22, 24; and a second amplifier stage 6 comprising a second differential pair of transistors 26, 28 arranged to receive and amplify the first differential output signal 22, 24 thereby providing a second differential output signal 38, 40.

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