US 2016/0079977 A1 · OVER-CURRENT AND/OR OVER-VOLTAGE PROTECTION CIRCUIT

Abstract

A logic inverter with over-current protection, according to one embodiment, includes: a transistor, an input signal line coupled to a gate terminal of the transistor or a base region of the transistor, an output signal line coupled to a drain terminal of the transistor or a collector region of the transistor, a power supply line coupled to the drain terminal of the transistor or a collector region of the transistor, a pull up resistor between a power supply and one of: the drain terminal of the transistor and the collector region of the transistor, and a feedback resistor between ground and one of: a source terminal of the transistor and an emitter region of the transistor. Other systems, methods, and computer program products are described in additional embodiments.

Claims20

Dependent claims

A logic inverter with over-current protection, comprising:

a transistor;
an input signal line coupled to a gate terminal of the transistor or a base region of the transistor;
an output signal line coupled to a drain terminal of the transistor or a collector region of the transistor;
a power supply line coupled to the drain terminal of the transistor or a collector region of the transistor;
a pull up resistor between a power supply and one of:
the drain terminal of the transistor and the collector region of the transistor;
and
a feedback resistor between ground and one of:
a source terminal of the transistor and an emitter region of the transistor.

6 more elements

A logic circuit with overcurrent feedback protection mechanism, the logic circuit comprising:

a first transistor;
a first input signal line coupled to a gate terminal of the first transistor or a base region of the first transistor;
a power supply line coupled to a source terminal of the first transistor or an emitter region of the first transistor;
a second transistor, wherein a drain terminal of the first transistor or a collector region of the first transistor is coupled to a source terminal of the second transistor or an emitter region of the second transistor;
a second input signal line coupled to a gate terminal of the second transistor or a base region of the second transistor;
an output signal line coupled to a drain terminal of the second transistor or a collector region of the second transistor;
a third transistor, wherein a drain terminal of the second transistor or a collector region of the second transistor is coupled to a drain terminal of the third transistor or a collector region of the third transistor, wherein the second input signal line is coupled to a gate terminal of the third transistor or a base region of the third transistor;
a feedback resistor coupled to ground and one of:
a source terminal of the third transistor and an emitter region of the third transistor;
and
a fourth transistor, wherein the drain terminal or the collector region of the second transistor is coupled to a drain terminal or a collector region of the fourth transistor, wherein the first input signal line is coupled to the gate terminal of the fourth transistor or the base region of the fourth transistor, wherein a source terminal of the fourth transistor or an emitter region of the fourth transistor is coupled to the feedback resistor.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/946,685Filed 19 Nov 2015

Priority

5 Apr 2013

Published

17 Mar 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H03K 19/00315
Modifications for increasing the reliability for protection: in field-effect transistor circuits
H02H 3/00
Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired
H03K 17/785
Using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled: controlling field-effect…
H03K 17/795
Using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled: controlling bipolar transistors

Family

Application61/809,239Us provisional application · filed 5 Apr 2013

Application14/231,227Continuation in part · filed 31 Mar 2014

Application14/946,685Continuation in part

US 2014/0300387 A1Published application

US 9,209,805 B2Related patent

US 9,634,664 B2Related patent

US 2016/0079977 A1This patent

From the US filing history. Foreign family members aren’t listed.

Over-current and/or over-voltage protection circuit

Life of this patent

Over-current and/or over-voltage protection circuit

Life of this patent

Abstract

Claims20