Active inductor having large inductance value and high Q value at high frequency as well as Q peak value being independently adjusted at same frequency
An active inductance, independent adjustment technology, applied to the network using active components, electrical components, impedance networks, etc., can solve the problems of lack of effective coordination, difficult large inductance value and high Q value tuning characteristics, and unsatisfactory topology. , to achieve the effect of increasing the equivalent inductance value, increasing the number of impedance conversions, and increasing the Q value
Active Publication Date: 2020-11-24
BEIJING UNIV OF TECH
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Problems solved by technology
At present, the topology of the active inductance circuit is not ideal enough, and there is a lack of effective coordination among the components, so it is difficult to obtain large inductance value, high Q value and excellent tuning characteristics at high frequency.
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[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further explained with reference to the attached drawings.
[0021] The active inductor circuit of that invention comprise a first transconductance unit (1), a second transconductance unit (2) with resistance and resistance-capacitance double feedback, a resistance loss cancel unit (3) with an adjustable bias terminal, and a bias unit (4) with two adjustable bias terminals.
[0022] In this embodiment of the active inductor, the first transconductance unit (1) comprises a first n-type MOS transistor (m n1 )； The second transconductance unit (2) with resistance and resistance-capacitance double feedback includes a second N-type MOS transistor (M n2 ), the third n-type MOS transistor (m n3 ), the first passive resistor (r 1 ), the second passive resistor (r 2 ), the first passive capacitor (c 1 ), the second passive capacitor (c 2 )； The resistance los...
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The invention discloses an active inductor having large inductance value and high Q value at high frequency as well as Q peak value being independently adjusted at same frequency, and relates to the field of radio frequency integrated circuits. The active inductor comprises a first transconductance unit (1), a second transconductance unit (2) with resistance and resistance-capacitance dual feedback, a resistance loss counteracting unit (3) with a bias voltage adjustable end, and a bias unit (4) with two bias voltage adjustable ends, wherein on one hand, the first transconductance unit (1) andthe second transconductance unit form a first impedance conversion loop together, on the other hand, the first transconductance unit (1) and the bias unit (4) form a second impedance conversion loop together, and the first impedance conversion loop and the second impedance conversion loop are connected in parallel, so that the inductance value is increased; the resistance loss counteracting unit improves the Q value; independent tuning of the Q peak value of the active inductor under the same high frequency can be realized by jointly and cooperatively tuning bias voltage of two bias voltage adjustable ends in the bias unit and bias voltage of one bias voltage adjustable end in the resistance loss counteracting unit.
Description
Technical field [0001] The invention relates to the field of radio frequency integrated circuits, in particular to an inductance element which can have a large inductance value and a high quality factor Q at a high frequency, and the Q peak value can be independently tuned at the same frequency in a high frequency region. technical background [0002] As RF integrated circuits (RFIC), such as filters, oscillators and amplifiers, are developing towards small size, reconfigurable performance and high performance, the requirements of high frequency, high Q-value, tunable inductance and Q-value for inductors, which are the basic components of RFIC, are put forward. [0003] However, the on-chip passive spiral inductor widely used in RFIC today is composed of multiple turns of metal wire, and the total length of the metal wire has a linear relationship with the required inductance value. In order to obtain a large inductance value, the metal wire needs to be very long, which means a l...
Claims
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IPC IPC(8): H03H11/36
CPCH03H11/36
Inventor 张万荣李祎康谢红云金冬月那伟聪
Owner BEIJING UNIV OF TECH