A 0.4 V Low Frequency Voltage-Controlled Ring Oscillator Using DTMOS Technique

Subject Areas : Majlesi Journal of Telecommunication Devices

Saber  Izadpanah tous ¹ (Sadjad Institute for Higher Education)
Ensieh  Asghari ² (Sadjad Institute for Higher Education)
Reza  Pourandoost ³ (Sadjad Institute for Higher Education)
Behrooz  Razeghi ⁴ (Ferdowsi University)

Received: 2013-04-14 Accepted : 2013-04-14 Published : 2013-03-01

Keywords: en,

Abstract :

In this paper, an ultra-low power ultra-low voltage five-stage low frequency voltage–controlled single-ended ring oscillator using dynamic threshold voltage MOSFET (DTMOS) is presented. The proposed oscillator is designed and simulated using TSMC 0.18μm RF CMOS technology with 0.4 V power supply. In this design all transistors working at the sub-threshold (weak inversion) region. The output frequency ranges from 26.6-210.5 kHz with control voltages of 0 V to 0.4 V. Its power consumption and phase noise at a 100 kHz offset at the minimum(maximum) oscillation frequency is respectively 6.42nW (8.62 nW) and -120.5 dBc/Hz (-113.15 dBc/Hz).

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