-
公开(公告)号：WO2023076197A1
公开(公告)日：2023-05-04
申请号：PCT/US2022/047633
申请日：2022-10-25
发明人： KOPPASSERY, Girish , HUSAIN, Amjath , GAIKWAD, Abhay Shankar , DASGUPTA, Samiran , VALLABHANENI, Madhukar
摘要： An amplifier circuit (300) includes an amplifier core (360) having a cascode transistor (372) and a gain transistor (374), a bias circuit (310) coupled to the amplifier core (360), the bias circuit (310) comprising: a first current source (312), a second current source (328), an operational transconductance amplifier (338), a bias cascode transistor pair having a bias cascode transistor (342) and a bias gain transistor (346), and a replica circuit (355) coupled to the first current source (312) and to the second current source (328).
-
公开(公告)号：WO2023076179A1
公开(公告)日：2023-05-04
申请号：PCT/US2022/047598
申请日：2022-10-24
摘要： Aspects of the present disclosure provide a circuit (810) configured to adjust an input impedance of an amplifier such as a low-noise amplifier (130). In certain aspects, the circuit (810) is coupled to a node (X), wherein the node (X) is between a first transistor (410) and a second transistor (420) of the amplifier (130). The circuit may include an inductor (Lf) and a capacitor (Cf) coupled in series, wherein the inductor (Lf) is coupled with one or more load inductors (Ld) of the amplifier (130) through negative magnetic coupling (M).
-
公开(公告)号：WO2022067208A1
公开(公告)日：2022-03-31
申请号：PCT/US2021/052245
申请日：2021-09-27
申请人： QUANTALRF AG , FARD, Ali , CARLSSON, Mats
发明人： FARD, Ali , CARLSSON, Mats
摘要： A method of operating an amplifier circuit (300) having a transformer (314) arranged so as to establish a magnetically coupled feedback loop between and output of an amplifier and an input of the amplifier. The method includes providing a DC bias current to the amplifier, and further includes increasing the DC bias current to improve a linearity of the amplifier circuit (300) wherein a transfer gain of the amplifier circuit (300) remains constant when the DC bias current is increased. A loop gain of the magnetically coupled feedback loop is set by selecting a coupling factor and turn-ratio of the transformer (314).
-
公开(公告)号：WO2022056150A1
公开(公告)日：2022-03-17
申请号：PCT/US2021/049698
申请日：2021-09-09
申请人： PSEMI CORPORATION
发明人： JIANG, Rong , SHAH, Khushali
摘要： Circuit and methods using a single low-noise amplifier (LNA) to provide amplification for a wide band of RF frequencies while maintaining high gain and a low noise factor. Embodiments include an amplifier circuit including an input signal path for receiving a wideband RF signal; a switched inductor tuning block coupled to the input signal path and configured to selectively couple one of a plurality of inductances to the input signal path; and an amplifier coupled to the switched inductor tuning block and configured to receive the RF signal after passage through the selected coupled inductance. The switched inductor tuning block includes a plurality of selectable branches, each including an RF input switch; an RF output switch; an inductor coupled between the RF input switch and the RF output switch; and first and second shunt switches coupled between a respective terminal of the inductor and circuit ground.
-
公开(公告)号：WO2021117375A1
公开(公告)日：2021-06-17
申请号：PCT/JP2020/040983
申请日：2020-10-30
申请人： 株式会社村田製作所
发明人： 杉山 幸大
摘要： 増幅回路（１００）は、入力端子（ｔ１）と出力端子（ｔ２）との間に設けられた第１増幅器（１０）と、入力端子（ｔ１）と出力端子（ｔ２）との間で第１増幅器（１０）と並列接続された第２増幅器（２０）と、を備え、第１増幅器（１０）は、カスコード接続されたトランジスタ（Ｍ１）およびトランジスタ（Ｍ２）を含み、第２増幅器（２０）は、トランジスタ（Ｍ３）を含み、トランジスタ（Ｍ１）は、入力端子（ｔ１）に接続されたゲート、グランドに接続されたソース、および、ドレインを有し、トランジスタ（Ｍ２）は、ゲート、トランジスタ（Ｍ１）のドレインに接続されたソース、および、出力端子（ｔ２）に接続されたドレインを有し、トランジスタ（Ｍ３）は、入力端子（ｔ１）に接続されたゲート、グランドに接続されたソース、および、出力端子（ｔ２）に接続されたドレインを有する。
-
公开(公告)号：WO2020163708A1
公开(公告)日：2020-08-13
申请号：PCT/US2020/017200
申请日：2020-02-07
摘要： Amplifier input protection circuits are described. In one embodiment, a photoreceiver for a lidar system has a photodetector configured to generate an output current in response to received light. A transimpedance amplifier is configured to receive the output current and generate a voltage output corresponding to the output current in response thereto, and a diode circuit has a cathode coupled at a node between the photodetector output and the transimpedance amplifier input.
-
公开(公告)号：WO2020144554A1
公开(公告)日：2020-07-16
申请号：PCT/IB2020/050056
申请日：2020-01-06
申请人： SILANNA ASIA PTE LTD
摘要： An apparatus for turning off a cascode amplifier having a common-gate transistor and a common-source transistor is disclosed that includes the cascode amplifier, a feedback circuit, and a bias circuit. The feedback circuit is configured to receive a drain-voltage from the drain of the common-source transistor when the common-source transistor is switched to a first OFF state and produce a first feedback signal. The drain-voltage is equal to a source voltage of the common-gate transistor and the drain-voltage increases in response to switching the common-source transistor to the first OFF state. The bias circuit is configured to receive the first feedback signal and produce a bias-voltage. A first gate-voltage is produced from the bias-voltage. The cascode amplifier is configured to receive the first gate-voltage and a second gate-voltage. The common-gate transistor is configured to switch to a second OFF state in response to receiving the second gate-voltage.
-
公开(公告)号：WO2020143934A1
公开(公告)日：2020-07-16
申请号：PCT/EP2019/073046
申请日：2019-08-29
摘要： A bias circuit (200) for a PA (100) is disclosed. It comprises a first transistor (M1) having its drain terminal and its gate terminal connected to a first circuit node (x) and its source terminal connected to a first supply terminal (GND), a first current source (I1) connected to the first circuit node (x), and a first resistor (R1) connected between the first circuit node (x) and a second circuit node (y). It further comprises a second transistor (M2) configured to receive a first component (RFinp) of a differential input signal to the PA at its gate terminal, having its drain terminal connected to the second circuit node (y) and its source terminal connected to a second supply terminal (VDD), and a third transistor (M3) configured to receive a second component (RFinn) of the differential input signal to the PA at its gate terminal, having its drain terminal connected to the second circuit node (y) and its source terminal connected to a second supply terminal (VDD). The gate terminals of the second transistor (M2) and the third transistor (M3) are configured to be biased by a first voltage (V1). The bias circuit is configured to generate a bias voltage (Vbias) for the PA (100) at the second circuit node (y).
-
公开(公告)号：WO2020138896A1
公开(公告)日：2020-07-02
申请号：PCT/KR2019/018343
申请日：2019-12-23
发明人： KIM, Kihyun , PARK, Hyunchul , AN, Kyuhwan , JANG, Jaesik , CHO, Yunsung
摘要： An electronic device including an amplifier which includes a first transistor configured to receive an input signal through a gate terminal thereof and having a source terminal electrically connected to ground, a second transistor configured to transmit an output signal through a drain terminal thereof and having a gate terminal electrically connected to the ground, and a switch electrically connected to the gate terminal of the second transistor and configured to switch a voltage being supplied to the gate terminal of the second transistor in accordance with turn-on or turn-off of the amplifier.
-
公开(公告)号：WO2019142526A1
公开(公告)日：2019-07-25
申请号：PCT/JP2018/044520
申请日：2018-12-04
发明人： 吉川 直人
摘要： 本開示の増幅回路は、第１のノードに接続されたドレインを有する第１のトランジスタと、第２のノードに接続されたドレインを有する第２のトランジスタと、電流源と、第３のノードに接続されたゲートと、第１のノードに接続されたソースと、電源に接続されたドレインとを有する第３のトランジスタと、第３のノードに接続されたゲートと、第２のノードに接続されたソースと、電源に接続されたドレインとを有する第４のトランジスタと、複数の回路とを備える。複数の回路のそれぞれは、第４のノードに接続されたゲートと、第２のノードに接続されたソースとを有する第５のトランジスタと、第４のノードに接続されたゲートと、第１のノードに接続されたソースとを有する第６のトランジスタと、電源と第５および第６のトランジスタのドレインとの間に挿入された共振回路とを有する。
-
-
-
-
-
-
-
-
-
搜索结果
299 条记录 (耗时 0.019 秒)
