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US 10,651,940 B1Granted
CMOS single-tube infrared transceiver
AssigneeBeken Corporation
InventorsLong Teng, Jiazhou Liu, Jian Wang
Life of this patent
Estimating the term…
Abstract
A CMOS IR transceiver includes an IR transmitter circuit, an IR receiver circuit, and an IR diode configured to either emit or receive an IR signal. CMOS elements, such as a PMOS current mirror, a PMOS switch, a NMOS switch, a NMOS current mirror, and a receiver enabling PMOSFET switch are used in the CMOS IR transceiver. The CMOS IR transceiver may have advantages of increased integration, occupying less space, and lower cost.
Claims19
A CMOS infrared (IR) transceiver comprising:
- an IR transmitter circuit comprising:
- a PMOS current mirror having a first PMOSFET and a second PMOSFET,
- a NMOS current mirror having a first NMOSFET and a second NMOSFET,
- a PMOS switch, and
- a NMOS switch coupled in series with the PMOS switch,
- wherein the PMOS current mirror and the NMOS current mirror is coupled in series between a power supply and the PMOS switch, wherein the NMOS current mirror is coupled in series between the PMOS switch and the ground, and the NMOS switch is coupled in parallel with the first NMOSFET, and wherein the PMOS switch and the NMOS switch are configured to receive a Pulse Width Modulated (PWM) signal from a Micro Controller Unit (MCU);
- an IR receiver circuit;
- and
- an IR diode coupled to the IR transmitter circuit and the IR receiver circuit configured to emit an output IR signal or accept an input IR signal.
6 more elements
A method of transmitting an infrared signal comprising:
- receiving a receiver enabling signal using a CMOS single-tube IR transceiver, the CMOS single-tube IR transceiver including:
- an IR transmitter circuit, the IR transmitter circuit comprising:
- a PMOS current mirror having a first PMOSFET and a second PMOSFET, a NMOS current mirror having a first NMOSFET and a second NMOSFET, a PMOS switch, and a NMOS switch, wherein the PMOS current mirror is coupled in series between a power supply and the PMOS switch, wherein the NMOS current mirror is coupled in series between the PMOS switch and the ground, wherein the NMOS switch is coupled in parallel with the first NMOSFET, and wherein the PMOS switch and the NMOS switch are configured to receive a Pulse Width Modulated signal from a Micro Controller Unit;
- an IR receiver circuit comprising a receiver enabling PMOSFET switch;
- and
- an IR diode coupled to the IR transmitter circuit and the IR receiver circuit and configured to emit or receive an IR signal;
- closing the IR receiver circuit;
- receiving the PWM signal using the IR transmitter circuit;
- and
- emitting a modulated IR signal by the IR diode.
7 more elements
A method of receiving an infrared signal comprising:
- receiving a receiver enabling signal using a CMOS single-tube IR transceiver, the CMOS single-tube IR transceiver including:
- an IR transmitter circuit configured to drive an emission of an IR signal;
- an IR receiver circuit comprising a receiver enabling PMOSFET switch, a current detector, a scale amplifier, and a comparator coupled in series;
- and
- an IR diode coupled to the IR transmitter circuit and the IR receiver circuit and configured to emit or receive an IR signal;
- closing the IR transmitter circuit;
- receiving a modulated IR signal by the IR diode to create a current signal;
- converting the current signal by the current detector into a voltage signal;
- amplifying the voltage signal by the scale amplifier;
- and
- outputting the voltage signal to a Micro Controller Unit (MCU).
8 more elements
Dependencies are inferred from the claim text.