Author Search Result
[Author] Kiichi YAMASHITA(2hit)
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Design of Low-Noise, Low-Power 10-GHz VCO Using 0.18-µm CMOS Technology
Kenichi OHHATA Katsuyoshi HARASAWA Makoto HONDA Kiichi YAMASHITA
- LETTER-Microwaves, Millimeter-Waves
- Vol:
- E89-C No:2
- Page(s):
- 203-205
A low-noise, low-power 10-GHz CMOS VCO was developed using cost-effective 0.18-µm CMOS technology. A complementary cross-coupled topology was employed to decrease the power dissipation and phase noise. The fabricated VCO demonstrates a low phase noise of -106 dBc/Hz at an offset frequency of 1 MHz and a low power dissipation of 4.4 mW.
Sandwich Structure Type RF-MEMS Variable Capacitor with Low Voltage Controllability and Wide Tuning Range
Takuma NISHIMOTO Kiichi YAMASHITA Kenichi OHHATA
- LETTER-Devices/Circuits for Communications
- Vol:
- E91-B No:2
- Page(s):
- 572-574
A sandwich structure type RF-MEMS variable capacitor is proposed, that consists of a movable middle plate, and fixed top and bottom plates having different areas. Simulation results show that the proposed capacitor can operate at a control voltage of less than 3.2 V; it achieves a tuning range of 4.8:1 (capacitance:630-130 fF) in the range of 0 to 3.2 V and at a frequency of 7.5 GHz.
