TV Set Top Box with an Improved Ability to Survive a Transient Signal
First Claim
Patent Images
1. An electronic circuit, comprising:
- a switching regulator comprising;
a switching regulator input node at which an input voltage is received;
a voltage holding node;
a capacitor coupled at one end to the voltage holding node and coupled at the other end to a reference voltage; and
a switching regulator control node, wherein the electronic circuit further comprises;
a reverse current blocking circuit comprising first and second nodes, wherein the first node is coupled to the voltage holding node and the second node is coupled to a regulated voltage output node, wherein the reverse current blocking circuit is configured to prevent a current from flowing from the regulated voltage output node into the capacitor;
an adjustable linear regulator;
wherein the reverse current blocking circuit is coupled between the switching regulator and the adjustable linear regulator; and
a switching regulator controller circuit coupled between the regulated voltage output node and the switching regulator control node, wherein the switching regulator is configured to generate a regulated voltage at the regulated voltage output node.
7 Assignments
0 Petitions
Accused Products
Abstract
A set top box used in a satellite TV system includes a diode coupled in a particular way to better protect an adjustable linear regulator used in the set top box from transient voltages as may result from lighting or the like.
3 Citations
22 Claims
-
1. An electronic circuit, comprising:
-
a switching regulator comprising; a switching regulator input node at which an input voltage is received; a voltage holding node; a capacitor coupled at one end to the voltage holding node and coupled at the other end to a reference voltage; and a switching regulator control node, wherein the electronic circuit further comprises; a reverse current blocking circuit comprising first and second nodes, wherein the first node is coupled to the voltage holding node and the second node is coupled to a regulated voltage output node, wherein the reverse current blocking circuit is configured to prevent a current from flowing from the regulated voltage output node into the capacitor; an adjustable linear regulator;
wherein the reverse current blocking circuit is coupled between the switching regulator and the adjustable linear regulator; anda switching regulator controller circuit coupled between the regulated voltage output node and the switching regulator control node, wherein the switching regulator is configured to generate a regulated voltage at the regulated voltage output node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. An electronic circuit, comprising:
-
a switching regulator comprising; a switching regulator input node at which an input voltage is received; a voltage holding node; a capacitor coupled at one end to the voltage holding node and coupled at the other end to a reference voltage; and a switching regulator control node;
wherein the electronic circuit further comprises;a reverse current blocking circuit comprising first and second nodes, wherein the first node is coupled to the voltage holding node and the second node is coupled to a regulated voltage output node, wherein the reverse current blocking circuit is configured to prevent a current from flowing from the regulated voltage output node into the capacitor; an adjustable linear regulator;
wherein the reverse current blocking circuit is coupled between the switching regulator and the adjustable linear regulator;a switching regulator controller circuit coupled between the regulated voltage output node and the switching regulator control node, wherein the switching regulator is configured to generate a regulated voltage at the regulated voltage output node; and a resistor and/or an inductor coupled between the adjustable linear regulator and a circuit output node, wherein a circuit output signal is generated at the circuit output node related to the regulated voltage. - View Dependent Claims (22)
-
Specification