Back to results
US 7,403,037 B2Granted
Signal amplifier
AssigneeNEC Electronics Corporation
InventorYoshizumi Haraguchi
Life of this patent
Estimating the term…
Abstract
The signal amplifier has a source follower receiving an input signal, a voltage divider generating a bias voltage which is input to the source follower through a different path from the input signal, and an inverter connected in series in the subsequent stage of the source follower and having such characteristics as to compensate characteristics variation of the voltage divider due to manufacturing parameter.
Claims10
A signal amplifier comprising:
- a source follower circuit comprising a first drive transistor outputting an amplified signal according to an input signal and a load transistor as a load;
- an inverter circuit connected in series with the source follower circuit, the inverter circuit comprising a second drive transistor outputting an amplified signal according to an input signal;
- and
- a bias circuit generating a bias voltage for determining an offset voltage of the source follower circuit, the bias circuit comprising a first and a second voltage dividing transistors connected vertically and outputting a bias voltage to the load transistor from an intermediate node of the first and the second voltage dividing transistors,
- wherein the second drive transistor and the first voltage dividing transistor have substantially the same characteristics.
2 more elements
A signal amplifier comprising:
- a source follower receiving an input signal;
- an inverter receiving an output signal of the source follower;
- a push-pull circuit receiving the output signal of the source follower and an output signal of the inverter;
- and
- a level shifter receiving an output signal of the source follower, wherein the output signal of the source follower is input to the push-pull circuit through the level-shifter.
2 more elements
A signal amplifier comprising:
- a source follower receiving an input signal;
- an inverter receiving an output signal of the source follower;
- and
- a push-pull circuit receiving the output signal of the source follower and an output signal of the inverter,
- wherein the push-pull circuit has a first and a second transistor connected vertically,
- an output signal of the inverter is input to a gate of the first transistor, and
- an output signal of the source follower is input to a gate of the second transistor.
4 more elements
Dependencies are inferred from the claim text.