US 2012/0163506 A1 · GFSK MODULATOR AND A METHOD FOR REDUCING RESIDUAL FREQUENCY MODULATION AND A DIGITAL ENHANCED CORDLESS TELECOMMUNICATION TRANSMITTER INCLUDING THE GFSK MODULATOR

Abstract

A GFSK modulator comprises: a first compensation module, configured to receive a GFSK pulse signal, apply a first amplitude compensation and a first delay compensation to the GFSK pulse signal, so as to generate a first compensated control signal; a second compensation module, configured to receive the GFSK pulse signal, apply a second amplitude compensation and a second delay compensation to the GFSK pulse signal, so as to generate a second compensated control signal; a closed-loop PLL module including a closed-loop PLL, configured to receive and use the first and the second compensated control signals to generate a modulated signal.

Claims12

Dependent claims

A GFSK modulator, comprising:

a first compensation module, configured to receive a GFSK pulse signal, apply a first amplitude compensation and a first delay compensation to the GFSK pulse signal, so as to generate a first compensated control signal;
a second compensation module, configured to receive the GFSK pulse signal, apply a second amplitude compensation and a second delay compensation to the GFSK pulse signal, so as to generate a second compensated control signal;
a closed-loop PLL module configured to receive and use the first and the second compensated control signals to generate a modulated signal.

A method for GFSK modulation, comprising:

receiving a GFSK pulse signal with a GFSK modulator, the GFSK modulator comprises:
a first compensation module configured to receive a GFSK pulse signal, apply a first amplitude compensation and a first delay compensation to the GFSK pulse signal, so as to generate a first compensated control signal;
a second compensation module, configured to receive the GFSK pulse signal, apply a second amplitude compensation and a second delay compensation to the GFSK pulse signal, so as to generate a second compensated control signal;
a closed-loop PLL module configured to receive and use the first and the second compensated control signals to generate a modulated signal;
and
performing GFSK modulation on the received GFSK pulse signal with the GFSK modulator.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/981,518Filed 30 Dec 2010

Priority

CN 201010602472.623 Dec 2010

Published

28 Jun 2012

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H03C 3/04
Details: means in or combined with modulating stage for reducing amplitude modulation
H03C 3/0933
With frequency divider or counter in the loop: using fractional frequency division in the feedback loop of the phase locked loop
H03C 3/0941
Using a phase locked loop: applying frequency modulation at more than one point in the loop
H03C 3/0958
Using a phase locked loop: applying frequency modulation by varying the characteristics of the voltage controlled oscillator

Gfsk modulator and a method for reducing residual frequency modulation and a digital enhanced cordless telecommunication transmitter including the gfsk modulator

Life of this patent

Gfsk modulator and a method for reducing residual frequency modulation and a digital enhanced cordless telecommunication transmitter including the gfsk modulator

Life of this patent

Abstract

Claims12