Semiconductor integrated circuit
OwnerMasahiro Shiinainventor
Life of this patent
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Abstract
Desired circuit characteristics are obtained by realizing a layout considering symmetry of semiconductor elements in a circuit block. Emitter follower circuits are disposed close to a differential amplifier and symmetrically with respect to a center line of the differential amplifier. Bipolar transistors in the emitter follower circuits are disposed close to bipolar transistors in the differential amplifier with difference in orientation by 90 degrees or 270 degrees. Hereby symmetry of the differential amplifier in the emitter follower circuits is improved to have better circuit characteristics, as the interconnections from the differential amplifier to the emitter follower circuits are kept from intersecting with each other and can be made equal in length.
Claims10
A semiconductor integrated circuit comprising:
- a circuit block having a plurality of semiconductor elements;
- and
- a pair of emitter follower circuits connected with the circuit block including transistors which are disposed in approximation to the circuit block and symmetrically with respect to a center line of the circuit block.
Dependencies are inferred from the claim text.