Passive phased injection locked circuit
First Claim
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1. A passive phased injection locked circuit comprising:
- first and second transmission lines, said first transmission line comprises a plurality of current-starved inverters, and said second transmission line comprises a corresponding number of current-starved inverters to said first transmission line;
each of said first and second transmission lines comprising1) an input and an output; and
2) said current-starved inverters connected electrically in series between said input and said output, each of said current-starved inverters being operative to delay said phase of AC signal applied to said input;
wherein an output of one of said current-starved inverters in said first or second transmission line is capacitively coupled to said input of said next higher corresponding one of said current-starved inverters in said other transmission line to form a network between said first and second transmission lines, said network being operative to advance said phases of said applied AC signal in concert along said transmission line.
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Abstract
The present invention relates to passive phased injection locked circuit and ring-based voltage controlled oscillators. A passive phased injection locked circuit comprises first and second transmission lines, each has a plurality of discrete elements, that are operative to delay the phase of AC signal. Between the first and second transmission lines, a capacitor network is formed to advance the phases of the AC signal in concert along the transmission lines. For the ring-based voltage controlled oscillators, each of the first and second transmission lines has an odd number of discrete elements.
16 Citations
14 Claims
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1. A passive phased injection locked circuit comprising:
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first and second transmission lines, said first transmission line comprises a plurality of current-starved inverters, and said second transmission line comprises a corresponding number of current-starved inverters to said first transmission line; each of said first and second transmission lines comprising 1) an input and an output; and 2) said current-starved inverters connected electrically in series between said input and said output, each of said current-starved inverters being operative to delay said phase of AC signal applied to said input; wherein an output of one of said current-starved inverters in said first or second transmission line is capacitively coupled to said input of said next higher corresponding one of said current-starved inverters in said other transmission line to form a network between said first and second transmission lines, said network being operative to advance said phases of said applied AC signal in concert along said transmission line. - View Dependent Claims (2, 3, 4, 5, 6)
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- 7. A voltage controlled oscillator comprising first and second ring oscillators, said first ring oscillators comprising one or more odd number of current-starved inverter stages, and second ring oscillators comprising a corresponding number of current-starved inverter stages to said first oscillators, said current-starved inverter stages of each of said first and second ring oscillators being connected electrically in series between an input and an output of said each of said first and second ring oscillators, said output of each of said first and second ring oscillators being electrically connected to said input thereof, said input of each of said current-starved inverter stages of one of said first or second ring oscillators having a connection to said output of said corresponding one of said current-starved inverter stages of said other one of first and second ring oscillators, said connection comprising a capacitor for forming a capacitor network between said first and second ring oscillators operative to tune said first and second ring oscillators responsive to a first signal applied to said input of said first ring oscillators or second signal applied to said input of said second ring oscillators.
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11. A tuned multiple-row voltage controlled oscillator, comprising:
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a plurality of ring oscillators, each of said plurality of said ring oscillators comprising one or more odd number of current-starved inverter stages and all of said plurality of said ring oscillators have said same number of said current-starved inverter stages, said current-starved inverter stages of each of said plurality of said ring oscillators being connected electrically in series between an input and an output of said each of said plurality of said ring oscillators, said output of each of said plurality of said ring oscillators being electrically connected to said input thereof, said input of each of said current-starved inverter stages of one of said plurality of said ring oscillators having a connection to said output of said corresponding adjacent one of said current-starved inverter stages of said other one of said plurality of said ring oscillators, said connection comprising a capacitor for forming a capacitor network between said one and said adjacent one of said plurality of said ring oscillators operative to tune said plurality of said ring oscillators responsive to a plurality of signals applied to said inputs of said plurality of said ring oscillators. - View Dependent Claims (12, 13, 14)
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Specification