Low-power high-speed signaling scheme over transmission line with unmatched terminations
OwnerPayam Heydariinventor
Life of this patent
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Abstract
A circuit includes a transmitter, a transmission line, and a receiver coupled to the transmitter through the transmission line, the transmission line used to transmit data at high-speed rates. At least one of the transmitter or receiver has associated therewith an unmatched termination, wherein either the transmitter or the receiver includes a finite impulse response (FIR) filter configured to cancel a reflected signal at a cancellation point situated at an input of the receiver, at an input of a driver, or at an output of the driver, the driver being coupled to an output of the transmitter, such that the reflected signal is substantially removed from the signal detected by the receiver.
Claims20
A circuit comprising:
- a transmitter;
- a transmission line;
- and
- a receiver coupled to the transmitter through the transmission line at high speed rates, at least one of the transmitter or receiver having associated therewith unmatched termination, wherein a Double-PAM3 modulation for data transmission across the transmission link is used to reduce complexity of the transmitter and the receiver while transmitting an effective same data rate as a PAM2 at ⅔ of the symbol rate.
A circuit comprising:
- a transmitter;
- a transmission line;
- a receiver coupled to the transmitter through the transmission line at high speed rates, wherein a Double-PAM3 modulation for data transmission across the transmission link is used to reduce complexity of the transmitter and the receiver;
- and
- a boosted-voltage circuit to turn on a mid switch in practical applications when a NMOS or a PMOS transistor is used for a mid switch so that NMOS or PMOS gate-source overdrive voltage gets higher than Vdd/2.
A circuit comprising:
- a transmitter;
- a transmission line;
- and
- a receiver coupled to the transmitter through the transmission line at high speed rates, at least one of the transmitter or receiver having no termination, wherein
- either the transmitter or the receiver includes a finite impulse response (FIR) filter configured to cancel a reflected signal at a cancellation point situated at an input of the receiver, at an input of a driver, at an output of the driver, the driver being coupled to an output of the transmitter.
Dependencies are inferred from the claim text.