US 9,813,655 B2
Detection of an analog connection in a video decoder
Serge Hembert, Vaulnaveys le Haut (FR)
Assigned to STMicroelectronics (Alps) SAS, Grenoble (FR)
Filed by STMicroelectronics (Alps) SAS, Grenoble (FR)
Filed on Aug. 15, 2016, as Appl. No. 15/237,103.
Claims priority of application No. 16 50731 (FR), filed on Jan. 29, 2016.
Prior Publication US 2017/0223299 A1, Aug. 3, 2017
Int. Cl. H03M 1/12 (2006.01); H04N 5/44 (2011.01)
CPC H04N 5/44 (2013.01) 23 Claims
OG exemplary drawing
 
1. A decoder configured to supply an analog signal, comprising:
a first circuit configured to supply a digital signal that is an image of said analog signal;
a digital-to-analog converter having an input configured to receive said digital signal;
an amplifier coupling an output of the digital-to-analog converter to a output terminal for supplying said analog signal; and
a second circuit configured to compare a signal representative of a voltage or current level on said output terminal with a reference signal and deduce from the comparison whether said output terminal is connected to an analog input terminal of a device for processing said analog signal,
wherein the reference signal is representative of said analog signal generated upstream of an input to the amplifier.