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AssigneeBlaupunkt-Werke GmbH
InventorsReinhard Wieschhoff, Andreas Rinne, Hubertus Pagany
Estimating the term…
To permit cooling of transistor push-pull bridge-type audio end stages in car radios, where heat dissipation and cooling of components is difficult to achieve, without entire interruption of signals being amplified, the temperature of a heat sink (HS) is being sensed by a temperature sensor (14), and, if a predetermined level is exceeded as determined, for example, by a threshold circuit (15), one of the bridge arms formed by a transistor (10) is controlled to become saturated, thereby grounding-out the applied signal, so that a loudspeaker (6) will operate at only half voltage and hence 1/4 power, to thereby permit cooling of components, while providing some reproduction of introduced audio signals from an audio input terminal (11).
Temperature controlled push-pull audio output stage, particularly for vehicular radios, having
Method of controlling the output temperature of a push-pull audio output stage, particularly for vehicular radios,
Dependencies are inferred from the claim text.