Modular solid-state power amplifier
阅读：601发布：2023-11-12
专利汇可以提供Modular solid-state power amplifier专利检索，专利查询，专利分析的服务。并且A modular solid-state amplifier capable of delivering several kilowatts of audio-frequency power over a frequency range of 0 to approximately 7,500 hertz and which has an output impedance selectively variable from substantially zero to approximately 100,000 ohms. The amplifier modules may readily be combined to obtain either voltage or current gain, or both, by appropriate series and parallel arrangements, or combinations thereof.，下面是Modular solid-state power amplifier专利的具体信息内容。
1. A modular solid-state power amplifier, comprising: first and second transistor input stages having parallelconnected first and second input terminals for receiving a signal input; a first transistor predriver amplifier direct-coupled to the output of said first input stage; a source of positive operating potential; a first driver amplifier, comprising a plurality of transistor stages each including a base, an emitter, and a collector, the bases thereof being connected in common to the output of said first predriver amplifier, the collectors thereof being connected to said source of positive operating potential; a two-terminal load device; a first output amplifier for amplifying the positive half-cycles of said signal input, comprising a plurality of cascaded emitter-follower transistor stages each including a base, an emitter, and a collector, the bases thereof being connected to the emitters of respective transistor stages of said first driver amplifier, the collectors thereof being connected to said source of positive operating potential, and the emitters thereof being connected to one terminal of said load device; a source of negative operating potential; a second transistor predriver amplifier direct-coupled to the output of said second input stage; a second driver amplifier, comprising a plurality of transistor stages each including a base, an emitter, and a collector, the bases thereof being connected in common to the output of said second predriver amplifier, the collectors thereof being connected to said one terminal of said load device; a second output amplifier for amplifying the negative halfcycles of said signal input, comprising a plurality of complementary-cascade transistor stages each including a base, an emitter, and a collector, the bases thereof being connected to the emitters of respective transistor stages of said second driver amplifier, the collectors thereof being connected to said one terminal of said load device, and the emitters thereof being connected to said source of negative operating potential; and means returning said sources of positive and negative operating potential to the other terminal of said load device.
2. An amplifier as defined in claim 1 including: time-delay switching means connected to said first and second input stages and to said first and second driver amplifiers for selectively controlling the application of said signal input thereto, thereby suppressing turn-on transients from reaching said load device.
3. A modular solid-state power amplifier as defined in claim 1 including: a plurality of protective diodes, one each being connected in series with the emitter of a corresponding transistor stage in said first and second driver amplifiers, and of said first and second output amplifiers, for preventing thermal run-away thereof.
4. A modular solid-state power amplifier as defined in claim 1 including: a plurality of checking diode means being connected in series with the collectors of corresponding transistor stages of said first and second driver amplifiers, and of said first and second output amplifiers, for the suppression of turn-off transients.
5. A modular solid-state power amplifier as defined in claim 1 including: diode clamp means connected between said second input terminal of said second transistor input stage and said one terminal of said load device for clamping the signal input to said second transistor input stage with respect to the output signal at said one terminal of said load device.
6. A direct-coupled bridge amplifier comprising: first and second power amplifier modules, each comprising; first and second transistor input stages having parallel-connected input terminals for receiving input signals; a first transistor predriver amplifier direct-coupled to the output of said first input stage; a source of positive operating potential; a first driver amplifier, comprising a plurality of transistor stages each including a base, an emitter, and a collector, the bases thereof being connected in common to the output of said first predriver amplifier, the collectors thereof being connected to said source of positive operating potential; a first output amplifier for amplifying the positive half-cycles of said input signals, comprising a plurality of cascaded emitter-follower transistor stages each including a base, an emitter, and a collector, the bases thereof being connected to the emitters of respective transistor stages of said first driver amplifier, the collectors thereof being connected to said source of positive operating potential, and the emitters thereof being connected to a common output terminal; a source of negative operating potential; a second transistor predriver amplifier direct-coupled to the output of said second input stage; a second driver amplifier, comprising a plurality of transistor stages each including a base, an emitter, and a collector, the bases thereof being connected in common to the output of said second predriver amplifier, the collectors thereof being connected to said common output terminal; a second output amplifier for amplifying the negative half-cycles of said input signals, comprising a plurality of complementary-cascade transistor stages each including a base, an emitter, and a collector, the bases thereof being connected to the emitters of respective transistor stages of said second driver amplifier, the collectors thereof being connected to said source of negative operating potential; a load device connected between the common output terminals of said first and second power amplifier modules; means for supplying a first push-pull input signal to the input terminals of said first and second transistor input stage of said first power amplifier module; and means for supplying a second push-pull input signal, which is 180 degrees out-of-phase with said first push-pull input signal, to the input terminals of said first and second transistor input stages of said second power amplifier module.
7. An amplifier as defined in claim 6 including: time-delay switching means connected to said first and second input stages and to saiD first and second driver amplifiers for selectively controlling the application of said signal input thereto, thereby suppressing turn-on transients from reaching said load device.
8. An amplifier as defined in claim 6 including: a plurality of protective diodes, one each of which is connected in series with the emitter of each transistor in the first and second driver amplifiers, and the first and second output amplifier, in each of said power amplifier modules, for preventing thermal run-away.
9. An amplifier as defined in claim 6 including: a plurality of checking diode means being connected in series with the collectors of corresponding transistor stages of said first and second driver amplifiers, and of said first and second output amplifiers, of each of said power amplifier modules, for suppressing turn-off transients.
10. An amplifier as defined in claim 6 wherein each of said power amplifier modules includes: diode clamp means connected between one of the terminals of said pair of input terminals of said second transistor input stage and said common output terminal, for clamping the input signals at said second transistor input stage with respect to the output signal at said common output terminal.
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