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An on-chip miniaturized 3-dB directional coupler is investigated in this paper using coupled synthesized coplanar waveguides (CPWs) on the integrated passive device (IPD) process. Coupled spiral inductors and MIM capacitors are used to achieve tight coupling between the lines. The proposed on-chip coupler is only 15% the length of a conventional design in CPW form on the same substrate. The design...
By utilizing synthesized stepped impedance resonators (SIRs) with high/low-impedance synthesized coplanar waveguides, a novel on-chip three-pole bandpass filter is realized on glass integrated passive device process. The synthesized SIR, formed by quasi-lumped series inductors and MIM capacitors, provides an effective way to utilize the chip area efficiently. The footprint of the miniaturized filter,...
In this paper, we present a low dropout voltage regulator (LDO) which can be programmed to generate four output voltages (3.3 V, 2.5 V, 1.8 V, and 0 V) by the external control signals. Between the error amplifier and the power transistor, we place a simple buffer so that the power supply rejection (PSR) of LDO can be improved. The design specification of the maximum load current is 100 mA. The proposed...
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