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US 10,705,130 B2Granted
Adaptive transmitter present detection
AssigneeIntegrated Device Technology, Inc.
InventorsRui Liu, Lijie Zhao
Life of this patent
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Abstract
A method of adaptively operating a transmit detection circuit is presented. The method includes powering the transmit detection circuit with a capacitor charged by an LDO; receiving a digital ping signal from a transmitter; receiving a clock signal from a local oscillator; updating a register to accommodate timing of the digital ping signal; and generating a signal indicating whether the transmitter is present.
Claims8
A method of adaptively operating a transmit detection circuit, comprising:
- powering the transmit detection circuit with a capacitor charged by a low-dropout (LDO) regulator;
- receiving a digital ping signal from a transmitter;
- receiving a clock signal from a local oscillator;
- updating a register to accommodate timing of the digital ping signal;
- and
- generating a signal indicating whether the transmitter is present.
3 more elements
A transmitter detection circuit, comprising:
- a low-dropout regulator that is powered when a digital ping signal is present;
- a capacitor coupled to receive power from the low-dropout regulator and supply a voltage;
- a control logic coupled to receive the voltage;
- a timing circuit coupled to a register and supplying a digital ping timing signal to the control logic;
- a clock circuit coupled to provide a clock signal to the control logic;
- and
- a transistor coupled to the control logic, the transistor being set to drive an output signal to a first state indicating presence of the digital ping signal if the digital ping signal arrives prior to the digital ping timing signal, the transistor being set to drive the output signal to a second state indicating absence of the digital ping signal if the digital ping timing signal arrives without a digital ping signal.
4 more elements
Dependencies are inferred from the claim text.