07-13-2021, 10:13 AM
(This post was last modified: 07-13-2021, 10:16 AM by branko tod.)
https://www.atlhifi.com/wp-content/uploa...168301.jpg
Sulzer regulators are well known and proved their efficiency over the years. Schematic offered here is slightly modified two-polarity Sulzer regulator which has some improvements over original one:
1. Active regulation elements (opamps U1 and U2) are supplied by capacitive multipliers Q1, R3, C5 and Q2, R4, C6 for negative rail respectively.
2. Reference voltage sources (Zener diodes D10 and D11 resp.) are fed by constant current sources (Q5, R13 and Q6, R16 resp.) which ensures constant currents via D10, D11 and hence their constant working points.
3. Reference voltage sources are placed on the right (stabilized) sides of the stabilizers which ensures much more lower noise over them.
4. Diodes D9, D12 ensure normal start of the two rails no matter what load is connected.
Sulzer regulators are well known and proved their efficiency over the years. Schematic offered here is slightly modified two-polarity Sulzer regulator which has some improvements over original one:
1. Active regulation elements (opamps U1 and U2) are supplied by capacitive multipliers Q1, R3, C5 and Q2, R4, C6 for negative rail respectively.
2. Reference voltage sources (Zener diodes D10 and D11 resp.) are fed by constant current sources (Q5, R13 and Q6, R16 resp.) which ensures constant currents via D10, D11 and hence their constant working points.
3. Reference voltage sources are placed on the right (stabilized) sides of the stabilizers which ensures much more lower noise over them.
4. Diodes D9, D12 ensure normal start of the two rails no matter what load is connected.