By Arjuna Marzuki, Ahmad Ismat Abdul Rahim, Mourad Loulou
Monolithic Microwave built-in Circuit (MMIC) is an digital equipment that's ordinary in all excessive frequency instant platforms. In constructing MMIC as a product, knowing research and layout suggestions, modeling, dimension technique, and present traits are essential.
Advances in Monolithic Microwave built-in Circuits for instant platforms: Modeling and layout Technologies is a vital resource of information on MMIC improvement, containing learn on idea, layout, and functional ways to built-in circuit units. This e-book is of curiosity to researchers in and academia operating within the components of circuit layout, built-in circuits, and RF and microwave, in addition to a person with an curiosity in monolithic instant equipment development.
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Additional info for Advances in Monolithic Microwave Integrated Circuits for Wireless Systems: Modeling and Design Technologies
2004). , 1960). This is implemented by adding a matching circuit between the source and the input of the amplifier. No degeneration- inductor in this type of circuit. , 2004). Hence, a compromise between the gain and noise performance was unavoidable. Figure 7 (a) shows the schematic of the CNM cascode LNA. This is followed by Figure 7 (b) which represents the small-signal model with noise sources of the CNM cascode LNA. For simplification, the CG transistor’s effects on the noise and frequency reponse in this figure is neglected.
M3 is for biasing the LNA circuit as M3 and M1 are in the current mirror connection. The ratio of M3 and M1 determines the current flowing through the cascode branch. Proper selection of M1’s width will determine the voltage across G-S of M1. R2 isolate the signal path from the current mirror. In this way, the input signal will be ac coupled to the LNA input. The value of R2 is not critical as long as it is much greater than the input impedance of the cascode LNA. The Ls in this circuit has the contributions as such described in sub-section Inductively-degenerated CS amplifier.
In term of output impedance matching, SW1 , and SW2 play an important roles in determining the load at the output. The on and off of these switches will set the output impedance matching of the LNA either to operate at upper band or lower band mode. The LNA is operating as follows: • • To set the output impedance of the LNA at upper band mode, SW1 has to be in ON mode and SW2 in OFF mode. In this condition, the total resistance (resistor between the drain and source of SW1 and R1 ) is representing the resistor which is in series with L1 .