Automatic adapt circuit for circumventing demodulator transients in radio receiver
First Claim
1. An auto-adapt circuit for altering radio receiver parameters due to demodulator transients and preventing the loss of received information comprising:
- at least one detector circuit connected to the output of a receiver demodulator;
at least one switch controlled by the detector circuit; and
wherein the at least one detector circuit detects a DC offset shift at an upper threshold limit or at a lower threshold limit such that the DC offset shift at an output of the receiver demodulator will actuate the at least one switch for varying dimodulator coupling parameters of the radio receiver.
2 Assignments
0 Petitions
Accused Products
Abstract
An auto-adapt circuit (200) for altering radio receiver parameters due to demodulator transients and preventing the loss of received information. The auto-adapt circuit includes a detector circuit (215) connected to the output of a receiver demodulator (203) and a switch (219) controlled by the detector circuit (215). The detector circuit (215) detects a transient voltage at an upper threshold limit or at a lower threshold limit such that a transient at an output of the receiver demodulator will actuate the at least one switch for varying demodulator coupling parameters of the radio receiver.
-
Citations
18 Claims
-
1. An auto-adapt circuit for altering radio receiver parameters due to demodulator transients and preventing the loss of received information comprising:
-
at least one detector circuit connected to the output of a receiver demodulator;
at least one switch controlled by the detector circuit; and
wherein the at least one detector circuit detects a DC offset shift at an upper threshold limit or at a lower threshold limit such that the DC offset shift at an output of the receiver demodulator will actuate the at least one switch for varying dimodulator coupling parameters of the radio receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A radio receiver system including an adaptive circuit for detecting and responding to the presence of a DC offset shift at the output of a demodulator comprising:
-
a demodulator circuit for receiving detected information;
at least one filtering circuit for receiving demodulated information;
at least one center slicer for converting the filtered information into a digital bit stream;
a decoder circuit for decoding data within the digital bit stream;
at least one detector circuit receiving information from the at least one filtering circuit for detecting a DC offset shift such that the signal crosses either above or below predetermined thresholds; and
at least one switch circuit responsive to the at least one detector for altering a receiver attack time and preventing loss of received information due to receiver DC offset shift. - View Dependent Claims (10, 11, 12)
-
-
13. A method for automatically adapting a radio receiver to circumvent demodulator DC offset shift comprising the steps of:
-
providing a demodulated output signal from a demodulator circuit;
alternating current (AC) coupling the demodulator output signal to a center slicer circuit;
monitoring the output of the demodulated output signal to detect the presence of a DC offset shift;
detecting a DC offset shift beyond an upper voltage limit or lower voltage limit; and
altering an resistor capacitor (RC) time constant of the AC coupled signal to provide a substantially rapid decay time of the DC offset for preventing loss of received information. - View Dependent Claims (14, 15, 16, 17, 18)
filtering the demodulator output signal for providing a tailored frequency response to the center slicer circuit.
-
-
18. A method for automatically adapting a radio receiver as in claim 13, further comprising the step of:
decoding the output of the center slicer circuit for providing decoded information.
Specification