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US 10,425,124 B1Granted
Repeaters with fast transitions from low-power standby to low-frequency signal transmission
AssigneePericom Semiconductor Corp.
InventorsJin-sheng Wang, Kwok Wing Choy, Kai Hung Yu
Life of this patent
Estimating the term…
Abstract
Repeaters are described that operate to rapidly transition from low-power standby states to a low frequency signal transmission state. Bandwidth for high-frequency signal transmission is preserved.
Claims23
A circuit, comprising:
- a power supply node;
- an internal circuit node;
- voltage-mode circuitry including a buffer and a switch connected between an output node of the buffer and the power supply node, the voltage-mode circuitry configurable based in part on a first state of a signal detector to provide a low frequency signal conforming to a serial data protocol to the internal circuit node via the buffer;
- and
- current-mode circuitry comprising the switch and a current-mode amplifier, the current-mode circuitry configurable based in part on a second state of the signal detector to provide a high frequency signal conforming to the serial data protocol to the internal circuit node via the current-mode amplifier.
2 more elements
A circuit, comprising:
- a power supply node;
- a first internal circuit node;
- a second internal circuit node;
- voltage-mode circuitry including a first buffer, a first switch, a second buffer, and a second switch, the first switch being connected between the power supply node and an output node of the first buffer, the second switch being connected between the power supply node and an output node of the second buffer, the voltage-mode circuitry being configurable based in part on a first state of a signal detector to provide a differential low frequency signal conforming to a serial data protocol at the first and second internal circuit nodes via the first and second buffers;
- and
- current-mode circuitry comprising the first and second switches and a differential current-mode amplifier, the current-mode circuitry being configurable based in part on a second state of the signal detector to provide a differential high frequency signal conforming to the serial data protocol to the first and second internal circuit nodes via the differential current-mode amplifier.
3 more elements
A circuit, comprising:
- a buffer having an output node connected to a power supply node through a switch, the buffer comprising a tri-state device:
- the tri-state device being configured to cause the output node of the buffer to follow an input signal to the buffer in response to an indication that a signal detector is in a first state;
- and
- the tri-state device also being configured to cause a high impedance at the output node of the buffer in response to an indication that the signal detector is in a second state;
- an internal circuit node;
- first circuitry configurable to operate in a voltage mode to transmit a low frequency signal to the internal circuit node via the output node of the buffer, the low frequency signal corresponding to a serial data protocol;
- and
- second circuitry configurable to operate in a current mode to transmit a high frequency signal to the internal circuit node, the high frequency signal corresponding to the serial data protocol.
5 more elements
Dependencies are inferred from the claim text.