Patent ID: 9565042
Date: 2017-02-07
CPC Classifications: H03L,H04L

Claim:
1. An ultra-low power transmitter applied in multi-channel frequency shift keying (FSK) communication, comprising: a fixed-frequency generation device providing a reference frequency; a low-frequency frequency synthesizer receiving the reference frequency many times according to a time sequence, and dividing the reference frequency with corresponding divisor, such that a plurality of divided frequency signals being generated; a detecting element detecting a parameter of the fixed-frequency generation device; and an injection locking device electrically connected to the low-frequency frequency synthesizer, wherein the low-frequency frequency synthesizer injects the plurality of divided frequency signals to the injection locking device according to the time sequence, such that the injection locking device generates a frequency-locked signal and filters a high-frequency noise resulted from the low-frequency frequency synthesizer at the same time, wherein the ultra-low power transmitter utilizes the frequency-locked signal to obtain a high-frequency emission signal, wherein the low-frequency frequency synthesizer comprises: wherein the detecting element provides the parameter to the fractional signal provider, and wherein the fractional signal provider adjusts the fractional signal according to the parameter.