Rotary Traveling Wave Oscillator Circuit

Abstract

Clock generation circuits, in particular rotary traveling wave oscillator circuits, are disclosed herein. Such a circuit includes pairs of signal lines connected together to form a closed loop and arranged such that they define at least one transition section in which the first The two wires in one portion span from one lateral side of the two wires in the second portion of paired signal wires to the other lateral side of the two wires in the second portion of paired signal wires .

Description

technical field [0001] The present invention relates to clock generation circuits, particularly clock generation circuits for generating and providing quadrature clock signals. Such quadrature clock signals may have relative phases of 0°, 90°, 180° and 270°, respectively. Background technique [0002] A quadrature clock signal may be required, for example, in a DAC (Digital to Analog Converter) circuit or an ADC (Analog to Digital Converter) circuit that may eg require a four-phase interleaved substantially sinusoidal clock signal. Of course, such a clock generation circuit can also be used in applications other than DAC circuits and ADC circuits. [0003] An example of an ADC circuit that needs to generate quadrature clock signals can be found in EP 2211468, which is incorporated herein by reference. An example of a DAC circuit that also needs to generate quadrature clock signals can be found in EP 2849345, which is likewise incorporated by reference into the present appl...

AI Technical Summary

Problems solved by technology

However, there are difficulties as to how to couple such an oscillator and how to control the phase offset

There is also a power penalty associated with providing such a circuit

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