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Tuning and Load Independent Telemetry Signal in Receiver

IP.com Disclosure Number: IPCOM000249669D
Publication Date: 2017-Mar-16
Document File: 3 page(s) / 199K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for using a tuning and load independent telemetry signal in a receiver. The proposal is to use the negative part of the radio frequency (RF) signal for the data link.

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Title

Tuning and Load Independent Telemetry Signal in Receiver

Abstract Statement

Disclosed is a method for using a tuning and load independent telemetry signal in a receiver. The proposal is to use the negative part of the radio frequency (RF) signal for the data link.

Problem Addressed 

Some inductive link frames have a first peak that is significantly lower when compared to the others. (Figure 1)

Figure 1: First peak is lower

When the load is high on the receiver side and the receiver voltage decreases, clipping occurs through a rectifying diode while the negative part of the signal remains normal. As the receiver is seeking a significant difference between the first peaks and the others, the receiver is not able to read the data. (Figure 2)

Figure 2: Receiver cannot read the data

Hence, the first peak is not clipping yet as the others are clipped. Figure 3 illustrates the resulting data link error. The negative portion of the signal (minus the offset) shows what the signal should look like without the clipping. The signal is no longer symmetrical.

Figure 3: Data link error

Novelty Statement

The novel solution is to increase the Q factor of the transmitter coil, the transmitter coil dampening, and the receiver coil Q, and then use the negative part of the radio frequency (RF) signal to decode data, independent from the clipping caused by low receiver voltage.

Description (Components, Process)

One solution is to add a third turn to the transformer. The idea is to invert t...