US 2026/0213784 A1 · HYBRID CIRCUIT WITH HIGH LINEARITY FOR SINGLE-ENDED AND BI-DIRECTIONAL TRANSCEIVER AND EXTRACTING METHOD OF INBOUND SIGNAL THEREOF

Abstract

A hybrid circuit with high linearity for single-ended and bi-directional transceiver and an extracting method of inbound signal thereof are disclosed. The hybrid circuit employs an isolation resistor to be connected to a single-ended transmission path in serial and a first hybrid signal and a second hybrid signal are generated at two ends of the isolation resistor. A voltage division ratio adjustment circuit adjusts two voltage swings of the first and second hybrid signals and then outputs a third and fourth hybrid signals with the same phase but different voltage swings to a comparison circuit. The comparison circuit directly compares the third and fourth hybrid signals and then outputs a voltage signal matching an inbound signal of a hybrid signal. Therefore, an adder or a subtractor consisted of a plurality of active components is not employed by the hybrid circuit and a linearity thereof is greatly increased.

Claims20

Dependent claims

A hybrid circuit with high linearity for single-ended and bi-directional transceiver, wherein the single-ended and bi-directional transceiver has a single signal terminal connected to a single transmission channel to constitute a single-ended transmission path, on which a hybrid signal mixed by an outbound signal and an inbound signal is transmitted, comprising:

an isolation resistor adapted to be connected to the single-ended transmission path in serial and having a first end and a second end, wherein a first hybrid signal is generated at the first end and a second hybrid signal is generated at the second end, and the first and second hybrid signals are in-phase;
a voltage dividing ratio adjustment circuit connected to the first and second ends of the isolation resistor to receive the first and second hybrid signals and adjust two voltage swings of the first and second hybrid signals by different voltage dividing ratios and to output a third and fourth hybrid signals with the same phase but different voltage swings;
and
a comparison circuit connected to the voltage dividing ratio adjustment circuit to receive and directly compare the third and fourth hybrid signals to output a voltage signal.

1 more element

An extracting method of an inbound signal of the hybrid circuit with high linearity for a single-ended and bi-directional transceiver, comprising steps of:

(a) obtaining a first and second hybrid signals with the same phase from a single-ended transmission path on which a hybrid signal is transmitted, wherein the hybrid signal is a mixture of an outbound signal and an inbound signal;
(b) adjusting two voltage swings of the first and second hybrid signals to generate a third and fourth hybrid signals with the same phase, wherein a voltage swing of the third hybrid signal is larger than that of the fourth hybrid signal;
and
(c) comparing the third and fourth hybrid signals to generate a voltage signal matching the inbound signal.

1 more element

Dependencies are inferred from the claim text.

Hybrid circuit with high linearity for single-ended and bi-directional transceiver and extracting method of inbound signal thereof

Life of this patent

Hybrid circuit with high linearity for single-ended and bi-directional transceiver and extracting method of inbound signal thereof

Life of this patent

Abstract

Claims20