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US 6,759,907 B2Granted
Distributed level-shifting network for cascading broadband amplifiers
AssigneeCentellax, Inc.
InventorsJerry Orr, Tim Bagwell
Life of this patent
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Abstract
A distributed and adjustable level-shifting network is integrated with cascaded amplifiers, eliminating the need for a direct current (dc) blocking capacitor between the amplifiers. The level-shifting network can be adjusted to compensate for process variations and to balance the crossover frequency response of the cascaded amplifiers.
Claims25
An integrated circuit, comprising:
- a first amplifier having an output transmission line;
- a second amplifier having an input transmission line direct-coupled to the output transmission line of the first amplifier;
- and
- an adjustable, distributed level-shifting network coupled to the input transmission line of the second amplifier for providing a direct current (dc) level to the second amplifier.
1 more element
An integrated circuit, comprising:
- an amplifier having an input and an output;
- and
- a level-shifting network coupled to the input of the amplifier, the level-shifting network including a level capacitor coupled in parallel with at least one diode, for providing direct current (dc) level shifting to the amplifier.
An integrated circuit, comprising:
- an amplifier having an input and an output;
- and
- a level-shifting network coupled to the input of the amplifier, the level-shifting network including one or more sections, each section including at least one diode coupled in parallel with at least one capacitor, for providing direct current (dc) level shifting to the amplifier.
An integrated circuit, comprising:
- a cascaded amplifier having a first stage direct-coupled to a second stage, wherein each stage includes at least one gain device;
- and
- a distributed level-shifting means coupled to at least one gain device, for providing direct current (dc) level shifting to the cascaded amplifier.
An integrated circuit including a distributed amplifier having an input transmission line and an output transmission line, comprising:
- a plurality of gain devices each having an input terminal and an output terminal, the output terminals coupled to the output transmission line;
- at least one diode coupled to the input transmission line and input terminal of each gain device to provide a direct current level to the input terminal of the gain device;
- and
- a level adjusting circuit coupled to the diodes for providing a direct current (dc) level to the gain devices.
1 more element
Dependencies are inferred from the claim text.