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US 7,119,617 B2Granted
Differential amplifier
AssigneeFujitsu Limited
InventorsHiroyuki Rokugawa, Takuji Yamamoto
Life of this patent
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Abstract
A differential amplifier suitably adapted to an ultra-high-speed signal transmitting apparatus. The differential amplifier includes a first inductor located between a differential transistor and a gate grounded transistor, an optional second inductor located between a load resistor and a power supply, and an optional third inductor located between a source follower transistor and an output terminal.
Claims15
A differential amplifier, comprising:
- a differential transistor;
- a first inductor having a first end and a second end, the first end being connected to a drain of said differential transistor;
- a gate grounded transistor having a source connected to the second end of said first inductor;
- a load resistor having a first end and a second end, the first end being connected to a drain of said gate grounded transistor;
- a second inductor connected between the second end of said load resistor and a power supply;
- a source follower transistor having a gate connected to the drain of said gate grounded transistor;
- and
- a third inductor connected between a source of said source follower transistor and an output terminal.
5 more elements
A differential amplifier, comprising:
- a differential transistor;
- a first inductor having a first end and a second end, the first end being connected to a drain of said differential transistor;
- a gate grounded transistor having a source connected to the second end of said first inductor;
- a load resistor having a first end and a second end, the first end being connected to a drain of said gate grounded transistor;
- a second inductor connected between the second end of said load resistor and a power supply;
- and
- a source follower transistor having a gate connected to the drain of said gate grounded transistor, and a source connected to an output terminal.
4 more elements
A differential amplifier, comprising:
- a differential transistor;
- a gate grounded transistor having a source connected to a drain of said differential transistor;
- a load resistor having a first end and a second end, the first end being connected to a drain of said gate grounded transistor;
- a first inductor connected between the second end of said load resistor and a power supply;
- a source follower transistor having a gate connected to the drain of said gate grounded transistor;
- and
- a second inductor connected between a source of said source follower transistor and an output terminal.
4 more elements
Dependencies are inferred from the claim text.