Digital satellite receiver controller
First Claim
Patent Images
1. A system comprising:
- a sensor to provide a signal corresponding to a status of an apparatus;
a satellite receiver to detect the signal from the sensor and to provide a signal indicating the status of the apparatus via a signal line;
a digital control circuit to receive the signal via the signal line and to supply power to the signal line, said digital control circuit to generate an indication signal to activate a device in response to receipt of the signal, the digital control circuit comprising;
a signal line converter circuit to determine the signal line voltage and to generate a signal corresponding to a voltage level when the voltage level of the signal line is within a first predetermined voltage range; and
a digital to analog converter circuit to set the voltage level of the power supplied to the signal line and to generate a voltage level within the second predetermined range, the first and second predetermined voltage ranges have maximum and minimum potentials with respect to ground;
a synchronization circuit to generate a periodic sync pulse on the signal line for transmission to the satellite receiver; and
a reference voltage generation circuit to simultaneously adjust the maximum and minimum potentials of the first and the second predetermined voltage ranges during the generation of the periodic sync pulse.
1 Assignment
0 Petitions
Accused Products
Abstract
This disclosure relates to a satellite receiver controller having a digital to analog circuit with an output having a dynamic range offset voltage, which is adjusted in synchronization with a signal pulse.
-
Citations
6 Claims
-
1. A system comprising:
-
a sensor to provide a signal corresponding to a status of an apparatus; a satellite receiver to detect the signal from the sensor and to provide a signal indicating the status of the apparatus via a signal line; a digital control circuit to receive the signal via the signal line and to supply power to the signal line, said digital control circuit to generate an indication signal to activate a device in response to receipt of the signal, the digital control circuit comprising; a signal line converter circuit to determine the signal line voltage and to generate a signal corresponding to a voltage level when the voltage level of the signal line is within a first predetermined voltage range; and a digital to analog converter circuit to set the voltage level of the power supplied to the signal line and to generate a voltage level within the second predetermined range, the first and second predetermined voltage ranges have maximum and minimum potentials with respect to ground; a synchronization circuit to generate a periodic sync pulse on the signal line for transmission to the satellite receiver; and a reference voltage generation circuit to simultaneously adjust the maximum and minimum potentials of the first and the second predetermined voltage ranges during the generation of the periodic sync pulse. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification