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AssigneeVanchip (Tianjin) Technology Co., Ltd.
InventorsYunfang Bai, Sheng Lin
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A voltage equalization method for use in a radiofrequency switch having multiple transistors connected in series and the radiofrequency switch. In the voltage equalization method, capacitors are additionally provided as parasitic capacitances between source electrodes and drain electrodes of transistors (M1-MN) connected in series to compose a radiofrequency switch, and voltage drop uniformity is implemented for the transistors (M1-MN) by adjusting the parasitic capacitances of the transistors (M1-MN). By means of different combinations of the positions, sizes, and spacing of metal bars on a first metal layer (1) and on a second metal layer (2), the parasitic capacitances between the source electrodes and the drain electrodes of the transistors (M1-MN) can be finely adjusted, thus increasing the voltage drop uniformity of the transistors (M1-MN). The method uses less transistors to accomplish the design of the radiofrequency switch.
A voltage equalization method for a multi-transistor series radiofrequency switch, wherein a parasitic capacitor is implemented by a metal strip arranged on each transistor and a respective metal layer of each transistor between a source and a drain of each of transistors connected in series to form the radiofrequency switch, the parasitic capacitor comprises an intra-layer parasitic capacitor between metal strips on same metal layer and an interlayer parasitic capacitor between metal strips on adjacent metal layers, wherein:
A radiofrequency switch, composed by sources and drains of N transistors which are connected in sequence to form a series structure comprising N+1 nodes, wherein N is a positive integer;
Dependencies are inferred from the claim text.