This circuit is from a 1972 Motorola publication. The used transistor can still be found, but it can be used equivalent. The circuit is powered by the amplifier with which it must operate.
Series and parallel regulator (CB8814E) The two voltage regulator configurations are combined in...
The configuration shown in the figure is suggested by Texas Instruments and supports equivalent...
Found in the November 1999 issue of Electronics Now magazine, this circuit generates a 6.67 Hz...