Current Sources and Voltage References

Using CMOS linear arrays to create current sources

Using Analog CMOS Arrays to Create Current Sources

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You can see another example of how a similarly modified biasing scheme is employed

for a typical input stage of a voltage-feedback CMOS op amp in Figure 9.12. It shows

how some of ALD’s matched CMOS transistor arrays could theoretically be used in

order to create one’s own op amp. The actual input amplifier stage is created by using

a pair of P-channel MOSFETs (in a quad transistor package), while their drain load

consists of a pair of N-channel MOSFETs (consisting of the second half of the

matched complimentary quad), functioning as the current mirror-sink. ...