BIAS SEQUENCING AND SWITCHING CIRCUIT

• US 20200136571A1
• Filed: 10/24/2018
• Published: 04/30/2020
• Est. Priority Date: 10/24/2018
• Status: Active Grant

• Current Assignee: BAE Systems Information and Electronic Systems Integration Incorporated (BAE Systems Plc)
• Original Assignee: BAE Systems Information and Electronic Systems Integration Incorporated (BAE Systems Plc)
• Inventors: Creamer, Carlton T., Bye, Christopher R., Touba, Vali, Creane, Stephen J
• Granted Patent: US 10,784,826 B2
• Time in Patent Office: Days
• CPC Class Codes: H03F 1/0211 with control of the supply voltage or current
• CPC Class Codes: H03F 1/0261 with control of the polarisation voltage or current, e.g. gliding Class A
• CPC Class Codes: H03F 1/0277 Selecting one or more amplifiers from a plurality of amplifiers
• CPC Class Codes: H03F 2200/451 the amplifier being a radio frequency amplifier
• CPC Class Codes: H03F 2200/513 the amplifier being made for low supply voltages
• CPC Class Codes: H03F 2203/211 using a combination of several amplifiers
• CPC Class Codes: H03F 3/19 with semiconductor devices only
• CPC Class Codes: H03F 3/211 using a combination of several amplifiers H03F3/60 takes precedence
• CPC Class Codes: H03F 3/245 with semiconductor devices only
• CPC Class Codes: H03F 3/68 Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics power amplifiers using a combination of several semiconductor amplifiers H03F3/211; combinations of amplifiers using coupling networks with distributed constants H03F3/602

Abstract

The present disclosure provide a device, system, and method for generating, in an electrical device, a 1 bit or a 0 bit that is received in a switching circuit powered by a battery. The device, system, and method generates, in the switching circuit, a negative bias voltage and a positive bias voltage. The device, system, and method transmits the negative bias voltage and the positive bias voltage to a power amplifier. The device, system, and method turns the power amplifier from an off-state to an on-state in response to receiving the negative bias voltage. The device, system, and method amplifies, with the power amplifier, a power signal moving through power amplifier when the amplifier is in the on-state.

Claims

1. A method comprising:

generating, in an electrical device, a 1 bit or a 0 bit;

receiving, in an enabling circuit coupled to a switching circuit powered by a battery, the 1 bit or the 0 bit;

generating, in the switching circuit, a negative bias voltage and a positive bias voltage in response to the enabling circuit receiving the 1 bit or the 0 bit;

transmitting the negative bias voltage and the positive bias voltage to a power amplifier;

turning the power amplifier from an off-state to an on-state in response to receiving the negative bias voltage; and

amplifying, with the power amplifier, a power signal moving through the power amplifier when the amplifier is in the on-state.

2. The method of claim 1, further comprising:

wherein the battery that is a single cell battery;

outputting, from the single cell battery, a voltage that is less than about 3.6 volts; and

transmitting the voltage through an input in the switching circuit.

3. The method of claim 1, further comprising:

transmitting the negative bias voltage to the power amplifier before transmitting the positive bias voltage to the power amplifier.

4. The method of claim 1, further comprising:

generating, with the enable circuit, a control bias voltage; and

transmitting the control bias voltage to a pin or port in a controller having an inverter.

5. The method of claim 1, further comprising:

transmitting, from a controller in the switching circuit, the positive bias voltage to a switching device in the switching circuit; and

transmitting, the positive voltage bias from the switching device to the power amplifier subsequent to the negative voltage bias is sent to the power amplifier.

6. The method of claim 1, further comprising:

creating, with a charge pump, a negative voltage bias at a regular frequency depending on an amount of current in the circuit.

7. The method of claim 1, further comprising:

generating the 1 bit or the 0 bit in the electrical device powered by the battery;

receiving the 1 bit or the 0 bit in the enabling circuit;

transmitting the 1 bit or the 0 bit through a trigger in the enabling circuit; and

transmitting the 1 bit or the 0 bit through an exclusive OR gate logic in the enabling circuit.

8. The method of claim 7, further comprising:

generating, with the enabling circuit, a shutdown signal based on the 1 bit or the 0 bit; and

receiving, at a pin in a controller having an inverter, the shutdown signal along transmission line from the enabling circuit.

9. The method of claim 1, further comprising:

applying a voltage from the battery at a first node of an inverter in a controller in the switching circuit;

applying a control voltage from the enabling circuit to another node of the inverter; and

shutting down the power amplifier in response to the controller receiving the voltage and the control voltage.

10. The method of claim 1, further comprising:

receiving the power signal in the power amplifier from the electrical device, wherein the electrical device is a radio frequency (RF) device and the power signal is an RF power signal.

11. An assembly comprising:

an electrical device configured to generate a 1 bit or a 0 bit;

a battery powering the electrical device;

a bias sequencing and switching circuit coupled with battery that generates bias voltages; and

an power amplifier connected to the bias sequencing and switching circuit that is switched between an on-state and an off-state in response to the bias voltages.

12. The assembly of claim 11, further comprising:

an enabling circuit in the bias sequencing and switching circuit that receives the 1 bit or the 0 bit;

a controller circuit in the bias sequencing and switching circuit, and the controller circuit having an inverter; and

a port or pin on the controller circuit coupled to a portion of the enable circuit.

13. The assembly of claim 12, further comprising:

a switching device in the bias sequencing and switching circuit coupled to a different port or pin on the controller circuit and coupled with the power amplifier; and

wherein the enable circuit is operative to transmit an enabling signal to be sent to the inverter that is timed to produce a negative bias voltage as the first output of the controller.

14. The assembly of claim 11, further comprising:

a positive bias generated by the bias sequencing and switching circuit; and

a negative bias generated by the bias sequencing and switching circuit;

wherein an initiation sequence of the bias sequencing and switching circuit is operative to send the negative bias from the bias sequencing and switching circuit to the power amplifier and subsequently send the positive bias from the bias sequencing and switching circuit to the power amplifier.

15. The assembly of claim 14, further comprising:

at least two parallel resistors along a transmission line carrying the positive bias from the bias sequencing and switching circuit to the RF power amplifier; and

at least one resistor along a transmission line carrying the negative bias from the bias sequencing and switching circuit to the RF power amplifier.

16. The assembly of claim 11, further comprising:

a single cell in the battery that produces a voltage of about 3.6 volts or less.

17. A switching circuit comprising:

a controller including an inverter and a plurality of nodes;

a switching device connected the controller via a transmission line extending from a node on the switching device to a node on the controller, and the switching device is operative to generate a negative bias voltage and a positive bias voltage;

an enabling circuit coupled to the controller and the switching device, and the enabling circuit includes a first input operative to receive a 0-bit or a 1-bit and a second input operative to receive the other of a 0-bit or a 1-bit;

a transmission line connected to an output node of the switching device that is operative to transmit the positive bias voltage to a power amplifier;

a transmission line connected to an output node of controller that is operative to transmit the negative bias voltage to the power amplifier; and

a voltage input coupled with a transmission line connected to the controller.

18. The switching circuit of claim 17, further comprising:

a bank of capacitors in connected between the voltage input and the switch device adapted to condition power flowing through the voltage input as a filter.