The LH0023/LH0023C and LH0043/LH0043C are complete sample and hold circuits including input buffer amplifier, FET output amplifier, analog signal sampling gate, TTL compatible logic circuitry and level shifting. They are designed to operate from standard ± 15V DC supplies, but provision is made on the LH0023/LH0023C for connection of a separate + 5V logic supply in minimum noise applications. The principal difference between the LH0023/ LH0023C and the LH0043/LH0043C is a 10:1 trade-off in performance between sample accuracy and sample acquisition time. Devices are pin compatible except for TTL logic polarity.