| 摘要 |
H-Bridge type power amplifier and its blocking means The invention concerns H-bridge type power amplifiers and their blocking means. The memory effect of the capacitive impedance of control inputs of each of the two blocking transistors in the H-bridge is used to block and unblock the amplifier synchronously with the amplifier input signal: a first switch and a semi-conductor element are placed in parallel with each other, in series with each of these control inputs, such that the blocking of the blockingtransistor necessitates the opening of the first switch under the control of theblocking signal, and is dependent on the sign of the charge carried by said capacitive impedance; a second switch controlled by the half periods of the input signal only enables the first switch to close and therefore unblocking of the considered blocking transistor for half periods that are not amplified by this blocking transistor.
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