Voltage-limited distributed current source for ultra-broadband impedance termination
AssigneeCentellax, Inc.
InventorsJerry Orr, Sean Pham, Jeffrey W. Meyer
Life of this patent
Estimating the term…
Abstract
A termination network simultaneously provides a voltage-limited output direct current (dc) bias and termination of a broadband distributed amplifier operating down to an arbitrary low frequency. It is capable of being fabricated in a single Integrated Circuit (IC) chip, without the excess power dissipation associated with biasing through a termination resistor, and without the use of external inductor networks. It also limits the maximum dynamic voltage swing on the outputs of the active gain devices used within the distributed amplifier, so as to increase the reliability of the distributed amplifier under large signal over drive conditions.
Claims77
An integrated circuit device, comprising:
- an integrated circuit having input and output lines, the integrated circuit having one or more gain devices connected to the output line;
- a distributed current source connected to the integrated circuit and having at least one current source connected to the output line for biasing at least one gain device;
- a frequency dependent termination network connected to the output line, for providing the integrated circuit with a termination impedance;
- and
- a sensing device connected to the output line for sensing a change in bias voltage on the output line.
An integrated circuit device, comprising:
- an integrated circuit having input and output lines, the integrated circuit having one or more gain devices connected to the output line;
- and
- a termination network connected to the output line, the termination network comprising:
- at least one current source connected to the output line for biasing at least one of the gain devices;
- and
- a sensing device connected to the output line for sensing a change in output bias voltage on the output line.
An integrated circuit device, comprising:
- an integrated circuit having input and output lines, the integrated circuit having one or more gain devices connected to the output line;
- a distributed current source connected to the integrated circuit and having at least one current source connected to the output line for biasing at least one of the gain devices;
- and
- a termination network connected to the output line, the termination network comprising:
- at least one current source connected to the output line for providing bias to at least one gain device;
- and
- a sensing device connected to the output line for sensing a change in output bias voltage on the output line.
A circuit for biasing and terminating one or more integrated circuits, comprising:
- a plurality of current sources connected to a transmission line, each current source having an output terminal for providing biasing current;
- a bypassing capacitor connected to the output terminal of each current source;
- a resistor-inductor (RL) network connected in shunt with the bypassing capacitor;
- and
- a termination network connected to the transmission line, the termination network comprising:
- a sensing device connected to the transmission line for sensing a change in output bias voltage on the transmission line.
Dependencies are inferred from the claim text.