2N4987 and 2N4990 (IP057E)

Unilateral switch (SUS) with 8 V of trigger voltage. This component is used to control SCRs and other applications.

Two-Tone Decoder (CB19928E)
Using two 567 PLLs, this circuit recognizes two audio tones in sequence providing a signal for a...
High Speed Instrumentation Amplifier (CB4940E)
This amplifier, found in a 1980s documentation, should be powered by a symmetrical source. Modern...
Zero crossing switch (CB6852E)
Found in Motorola documentation from the 90s, this circuit makes use of a triac from that time. The...