Yes it is. Simply download and test my Microcap12 circuit file [ https://www.patreon.com/posts/60580885 ] and you will see only several microvolts DC output offset [ https://c10.patreonusercontent.com/4/patreon-media/p/post/64958853/4e3bb8ef00ec42f4bd07663deeb42f06/eyJxIjoxMDAsIndlYnAiOjB9/1.jpg?token-time=1660953600&token-hash=wbYAnpmA35FwAhB0ZRlQjzJtwDKbNaamVIeCMcg3QTg= ] . more detailed here https://www.patreon.com/posts/1-5-mikrovolta-v-64958853Seems that DC servo is used as virtual ground for biasing resistor of the CCS at SE output stage. Varying current through diodes provides enough Vbe variation on CCS, to compensate for any change at the output.
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