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AssigneeNational Taiwan University
InventorsSebastian Hoppner, Zuo-Min Tsai, Huie Wang
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A differential signal driven direct-current voltage generating device is proposed, which is designed for use with a PLL (phase-locked loop) circuit or a DLL (delay-locked loop) circuit system for generating an output of a direct-current (DC) voltage in response to a pair of differential signals, such as phase-difference signals; and which is characterized by the utilization of a capacitor-switched voltage doubler for doubling the output voltage of a charge pump so that the doubled voltage can be used as a control voltage for a PLL-VCO (voltage-controlled oscillation) or a DLL-VCDL (voltage-controlled delay line) circuit for generation of an output oscillating signal with a wider frequency range.
A differential signal driven direct-current voltage generating device for integration to a circuit system for generating an output of a direct-current (DC) voltage in response to a pump-up enable signal and a pump-down enable signal, which comprises:
A differential signal driven direct-current voltage generating device for integration to a circuit system for generating an output of a direct-current (DC) voltage in response to a pump-up enable signal and a pump-down enable signal, which comprises:
A differential signal driven direct-current voltage generating device for integration to a PLL (phase-locked loop) circuit system having a VCO (voltage-controlled oscillation) circuit, a frequency divider, and a phase detector, for generating an output of a direct-current (DC) voltage in response to a pump-up enable signal and a pump-down enable signal from the phase detector;
Dependencies are inferred from the claim text.
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The phase or frequency detector generating up-down pulses: the up-down pulses controlling source and sink current generators, e.g. a charge pump
Concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal: using special…
Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop:…
Automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or
About 2 years 4 months of term left · ends 23 Feb 2029 (estimated)
1. Field of the Invention
This invention relates to electronic circuit technology, and more particularly, to a differential signal driven direct-current (DC) voltage generating device which is designed for integration to a PLL (phase-locked loop) or a DLL (delay-locked loop) circuit system for generating an output of a DC voltage in response to an input of a differential signal, such as a phase-difference signal.
2. Description of Related Art
The invention can be more fully understood by reading the following detailed description of the preferred embodiments, with reference made to the accompanying drawings, wherein:
FIG. 1 is a schematic diagram showing the I/O functional model of the DC voltage generating device of the invention;
FIG. 2A is a schematic diagram showing a first application example of the DC voltage generating device of the invention;
The differential signal driven direct-current voltage generating device according to the invention is disclosed in full details by way of preferred embodiments in the following with reference to the accompanying drawings.
Function of the Invention
FIG. 1 is a schematic diagram showing the input/output (I/O) functional model of the differential signal driven direct-current (DC) voltage generating device according to the invention (which is here encapsulated in a box indicated by the reference numeral 100, and is hereinafter referred in short as “DC voltage generating device”). As shown, the DC voltage generating device of the invention 100 is designed with an I/O interface having a pair of input ports (UP, DN) and an output port (Vout), where the input ports (UP, DN) are used for reception of a pair of differential signals, such as a pair of phase-difference signals, which are presented respectively as a pump-up enable signal (UP) and a pump-down enable signal (DN); while the output port (Vout) is used to output a DC voltage whose amplitude will be pumped up to a higher level at the presence of the pump-up enable signal (UP) and pumped down to a lower level at the presence of the pump-down enable signal (DN).