CPC H04R 1/222 (2013.01) [H04R 1/083 (2013.01); H04R 3/00 (2013.01); H04R 9/025 (2013.01); H04R 9/048 (2013.01); H04R 1/08 (2013.01); H04R 1/2876 (2013.01)] | 11 Claims |
1. A phantom-powered transistor preamplifier gain circuit for a microphone or a musical instrument utilized in an audio application, the phantom-powered transistor preamplifier gain circuit comprising:
a first transistor having its gate terminal coupled to a first signal input terminal, which is configured to receive at least one sound source signal;
a second transistor coupled to a first signal output terminal, wherein the second transistor is also coupled in cascode to the first transistor and is powered by an external phantom power supply;
a third transistor having its gate terminal coupled to a second signal input terminal, which is configured to receive the at least one sound source signal; and
a fourth transistor coupled to a second signal output terminal, wherein the fourth transistor is coupled in cascode to the third transistor and is powered by the external phantom power supply.
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