Patent
Fully-differential relaxation-type voltage controlled oscillator and method therefor
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TLDR
In this paper, a fully differential relaxation-type voltage controlled oscillator (VCO) includes an operational transconductance amplifier (OTA) for receiving a differential input voltage, and a comparator having hysteresis detects the charge on the capacitor.Abstract:
A fully-differential relaxation-type voltage controlled oscillator (VCO) (30) includes an operational transconductance amplifier (OTA) (31) for receiving a differential input voltage. The OTA (31) provides a charging current to a capacitor (33) proportional to the differential input voltage during a first phase of an output signal, and provides a discharging current to the capacitor (33) proportional to the differential input voltage during a secon d phase of the output signal. A comparator having hysteresis (34) detects the charge on the capacitor. A latching portion (35) latches the output of the comparator (34) to provide non-overlapping clock signals.read more
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References
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Journal ArticleDOI
A 30-MHz low-jitter high-linearity CMOS voltage-controlled oscillator
M.H. Wakayama,Asad A. Abidi +1 more
TL;DR: A fully monolithic voltage-controlled oscillator (VCO) with an on-chip timing capacitor and a maximum oscillation frequency of 30 MHz is reported, using a novel on- chip servo loop.
Journal ArticleDOI
MOS oscillators with multi-decade tuning range and gigahertz maximum speed
TL;DR: In this paper, the authors studied the realization of fully integrated MOS oscillators with multidecade tuning range and top speed exceeding 1 GHz, and found that the best approach for high-speed, wide-range specifications is the relaxation network of the constant current charge type.
Patent
Differential relaxation oscillator
TL;DR: In this paper, a relaxation oscillator is disclosed which includes first and second currents for charging and discharging a capacitor (50) wherein the slew rate of the dynamic voltages developed at the terminals of the capacitor ( 50) remain substantially constant for each frequency of operation which desensitizes the oscillator to the effects of the inherent stray capacitance, and improves the accuracy of output frequency.
Patent
Integrated NMOS circuit
TL;DR: In this paper, an integrated NMOS circuit includes an external connection terminal to be connected to an external component, a control voltage terminal, a supply voltage terminal and a reference voltage terminal.