METHODS AND APPARATUS FOR RESISTANCE COMPRESSION NETWORKS
First Claim
Patent Images
1. A circuit comprising:
- a resistance compression network including;
an input port;
a first output port for coupling to a first load;
a second output port for coupling to a second load;
a reactive network coupled to the first input port, the first output port, and the second output port, wherein at a first frequency an equivalent resistance of the compression network input port varies over a first ratio as equivalent resistances of the first and second loads vary together over a second ratio which is larger than the first ratio.
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Abstract
A resistance compression network substantially decreases the variation in effective resistance seen by a tuned rf inverter as loading conditions change. Circuits can include resistance compression networks and rectifiers to form rf-to-dc converters having narrow-range resistive input characteristics.
29 Citations
27 Claims
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1. A circuit comprising:
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a resistance compression network including;
an input port;
a first output port for coupling to a first load;
a second output port for coupling to a second load;
a reactive network coupled to the first input port, the first output port, and the second output port, wherein at a first frequency an equivalent resistance of the compression network input port varies over a first ratio as equivalent resistances of the first and second loads vary together over a second ratio which is larger than the first ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A circuit, comprising:
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an inverter circuit;
a resistance compression network including an input port and first and second output ports, and a reactive network, the input port coupled to the inverter circuit;
the reactive network coupled to the first input port and the first and second output ports; and
a first rectifier coupled to the first output port and a second rectifier coupled to the second output port, wherein at a first frequency an equivalent resistance of the compression network input port varies over a first ratio as equivalent resistances of the first and second rectifiers vary together over a second ratio which is larger than the first ratio. - View Dependent Claims (14, 15, 16)
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17. A method, comprising:
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coupling reactive elements to form a resistance compression network, the compression network having an input port and first and second output ports, the first output port being adapted for coupling to a first load and the second output port being adapted for coupling to a second load;
wherein at a first frequency an equivalent resistance of the compression network input port varies over a first ratio as equivalent resistances of the first and second loads vary together over a second ratio which is larger than the first ratio. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A circuit, comprising:
a resistance compression network having an input port and first and second output ports, the first output port to drive a first load and the second output port to drive a second load, the first input port having an input impedance at a first frequency that varies a first amount as impedances of the first and second loads vary substantially together by a second amount that is greater than the first amount. - View Dependent Claims (25, 26, 27)
Specification