Author Search Result
[Author] Yoshiaki YOSHIHARA(2hit)
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Wide Tuning Range LC-VCO Using Variable Inductor for Reconfigurable RF Circuit
Yoshiaki YOSHIHARA Hirotaka SUGAWARA Hiroyuki ITO Kenichi OKADA Kazuya MASU
- PAPER
- Vol:
- E88-A No:2
- Page(s):
- 507-512
This paper presents a novel wide tuning range CMOS Voltage Controlled Oscillator (VCO). VCO uses an on-chip variable inductor as an additional variable element to extend the tuning range of VCO. The fabricated variable inductor achieves the variable range of 35%. The VCO was fabricated using 0.35 µm standard CMOS process, and can be tuned continuously from 2.13 GHz to 3.28 GHz (tuning range of 38%) without degradation of phase noise. Wide tunable LC-VCO using a variable inductor is one of the key circuits for reconfigurable RF circuit.
A 60-GHz Phase-Locked Loop with Inductor-Less Wide Operation Range Prescaler in 90-nm CMOS
Hiroaki HOSHINO Ryoichi TACHIBANA Toshiya MITOMO Naoko ONO Yoshiaki YOSHIHARA Ryuichi FUJIMOTO
- PAPER
- Vol:
- E92-C No:6
- Page(s):
- 785-791
A 60-GHz phase-locked loop (PLL) with an inductor-less prescaler is fabricated in a 90-nm CMOS process. The inductor-less prescaler has a smaller chip area than previously reported ones. The PLL operates from 61 to 63 GHz and consumes 78 mW from a 1.2 V supply. The phase noise at 100 kHz and 1 MHz offset from carrier are -72 and -80 dBc/Hz, respectively. The prescaler occupies 8040 µm2. The active area of the PLL is 0.31 mm2.
