A method for determining component parameters of a low-noise amplifier and the low-noise amplifier
A technology of low noise amplifier and determination method, which is applied in the direction of improving the amplifier to reduce the influence of noise, etc., can solve the problems of not being able to meet the performance index and high noise at the same time
Active Publication Date: 2014-10-01
中科芯云微电子科技有限公司
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Problems solved by technology
Usually, in the case of meeting the power consumption constraints, other performance indicators, such as noise factor, impedance matching, and gain, cannot be satisfied at the same time. Therefore, the determination of the parameters of LNA circuit components is one of the difficult problems in the industry.
[0004] In summary, the low noise amplifiers in the prior art have the following disadvantages: under the condition of low power consumption, the noise is too high
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[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0063] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0064] figure 1 A circuit diagram of a low noise amplifier (LNA) provided for the present invention. Such as figure 1 As shown, the low noise amplifier includes: RF input tube Q 1 , and the RF input tube Q 1 T...
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The invention discloses a low-noise amplifier and an element parameter determining method thereof. The element parameter determining method comprises the steps of: establishing a small-signal noise equivalent model according to a circuit structure and a signal source of the low-noise amplifier; establishing a noise factor formula of the low-noise amplifier according to the small-signal noise equivalent model; calculating mathematic analytic formulas corresponding to an internal resistance RS and a first inductance LB of the signal source when a noise factor is minimum according to the noise factor formula; and establishing input resistance formulas of the low-noise amplifier: jointing the formulas and the mathematic analytic formulas to obtain corresponding element parameter values of the corresponding capacitance and the corresponding inductance. By adopting the low-noise amplifier designed by the method disclosed by the invention, under the condition of power restriction (low power consumption), the performance of low noise can be obtained.
Description
technical field [0001] The invention relates to the field of integrated circuit design, in particular to a method for determining component parameters of a low-noise amplifier and the low-noise amplifier. Background technique [0002] A low noise amplifier (LNA, Low Noise Amplifier) is one of the important components in a radio frequency integrated circuit. It is located in the first stage of the receiving chip and is directly connected to the antenna signal, so the noise characteristics of the LNA will greatly affect the noise performance of the entire system. [0003] In the prior art, reducing the noise factor of the LNA is mainly realized by increasing the power consumption, but for a receiving chip used in wireless mobile communication, low power consumption is a hard target, and it must be within the constraints of low power consumption To achieve a low noise factor, it is necessary to adjust the component parameters of the LNA circuit to improve the circuit perform...
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IPC IPC(8): H03F1/26
Inventor 陈岚俞思辰吕志强
Owner 中科芯云微电子科技有限公司