US 10,312,872 B2 · Managing a shoot-through condition in a component containing a push-pull output stage

Abstract

Shoot-through condition in a component containing an amplifier with a push-pull output stage is managed. A first current in a first transistor of the output stage is mirrored to generate a first mirrored current. A second current in a second transistor of the output stage is mirrored to generate a second mirrored current. A sum of the first mirrored current and said second mirrored current is generated. When a magnitude of the sum exceeds a first pre-determined threshold, a respective control voltage of the first transistor and the second transistor is adjusted to reduce the first current and the second current at least until the sum falls below a second pre-determined threshold. In an embodiment, the first pre-determined threshold equals the second pre-determined threshold. In an embodiment, the component is a class-L power amplifier.

Claims14

Dependent claims

A method of managing a shoot-through condition in a component, said component comprising an amplifier that includes a push-pull output stage, said method comprising:

mirroring a first current in a first transistor of said output stage to generate a first mirrored current;
mirroring a second current in a second transistor of said output stage to generate a second mirrored current;
and
generating a sum of said first mirrored current and said second mirrored current;
and
when a magnitude of said sum exceeds a first pre-determined threshold, adjusting a respective control voltage of said first transistor and said second transistor to reduce said first current and said second current at least until said sum falls below a second pre-determined threshold.

3 more elements

A component comprising:

an amplifier containing a push-pull output stage, said output stage comprising a source-side transistor and a sink-side transistor;
said push-pull output stage to provide an amplified signal by amplifying an input signal,
wherein said amplifier comprise an analog shoot-through control block operable to:
mirror a first current in said source-side transistor to generate a first mirrored current;
mirror a second current in said sink-side transistor to generate a second mirrored current;
generating a sum of said first mirrored current and said second mirrored current;
and
when a magnitude of said sum begins exceeds a first pre-determined threshold, adjusting a respective control voltage of said first transistor and said second transistor to reduce said first current and said second current at least until said sum falls below a second pre-determined threshold.

5 more elements

Dependencies are inferred from the claim text.

Managing a shoot-through condition in a component containing a push-pull output stage

Life of this patent

Managing a shoot-through condition in a component containing a push-pull output stage

Life of this patent

Abstract

Claims14