Hydraulic circuit (1, 1 I, 1 II, 1 III) of a dual clutch transmission, in particular of a car transmission, by which a pressure-controllable actuation (3, 3 I, 3 II, 3 III, 3 IV, 3 V, 3 VI, 3 VII, 3 VIII) of a first clutch actuator, which in particular is spring-loaded on one side, and of a second clutch actuator, which in particular is spring-loaded on one side, can be carried out by means of a pressure control valve upstream of the first clutch actuator and by means of a pressure control valve upstream of the second clutch actuator, wherein each pressure control valve (51, 53) is seated in a separate hydraulic branch (65, 165-1, 165-2), the actuator of which is the clutch actuator (57, 59), wherein at least one, in particular both, of the pressure control valves (51, 53) is a three-state valve (77, 77 I, 77 II, 77 III, 77 IV) having a port for connecting the pressure control valve (51, 53) to its clutch actuator (57, 59), wherein one state is a hydraulic cut-off state, and having a first bypass line around the first pressure control valve and having a second bypass line around the second pressure control valve, wherein the pressure control valves (51, 53) are proportional pressure control valves, characterized in that a cut-off valve (103, 103 I, 103 II, 103 III, 103 IV) is provided upstream of the pressure control valves (51, 53), said cut-off valve being an at least two-state cut-off valve (105, 105 I, 105 II, 105 III, 105 IV, 107, 107 I, 107 II, 107 III, 107 IV, 107 V), wherein the port of at least one of the pressure control valves (51, 53) has a first diameter, and in that a flow control valve (71, 73, 83, 83 I), such as a check valve (83, 83 I), is provided in at least one bypass line (67, 68) that has a second diameter (189, 189 I), which flow control valve can be opened in a throughflow direction when there is a pressure difference in a supply line extending from the pressure control valve (51, 52) to the associated clutch actuator (57, 59), as a result of which a flow can be permitted to pass through the diameter (189, 189 I) of the bypass line (67, 68), which is larger in comparison with the diameter of the port. in particular of a car transmission, by which a pressure-controllable actuation (3, 3 I, 3 II, 3 III, 3 IV, 3 V, 3 VI, 3 VII, 3 VIII) of a first clutch actuator, which in particular is spring-loaded on one side, and of a second clutch actuator, which in particular is spring-loaded on one side, can be carried out by means of a pressure control valve upstream of the first clutch actuator and by means of a pressure control valve upstream of the second clutch actuator, wherein each pressure control valve (51, 53) is seated in a separate hydraulic branch (65, 165-1, 165-2), the actuator of which is the clutch actuator (57, 59), wherein at least one, in particular both, of the pressure control valves (51, 53) is a three-state valve (77, 77 I, 77 II, 77 III, 77 IV) having a port for connecting the pressure control valve (51, 53) to its clutch actuator (57, 59), wherein one state is a hydraulic cut-off state, and having a first bypass line around the first pressure control valve and having a second bypass line around the second pressure control valve, wherein the pressure control valves (51, 53) are proportional pressure control valves, characterized in that a cut-off valve (103, 103 I, 103 II, 103 III, 103 IV) is provided upstream of the pressure control valves (51, 53), said cut-off valve being an at least two-state cut-off valve (105, 105 I, 105 II, 105 III, 105 IV, 107, 107 I, 107 II, 107 III, 107 IV, 107 V), wherein the port of at least one of the pressure control valves (51, 53) has a first diameter, and in that a flow control valve (71, 73, 83, 83 I), such as a check valve (83, 83 I), is provided in at least one bypass line (67, 68) that has a second diameter (189, 189 I), which flow control valve can be opened in a throughflow direction when there is a pressure difference in a supply line extending from the pressure control valve (51, 52) to the associated clutch actuator (57, 59), as a result of which a flow can be permitted to pass through the diameter (189, 189 I) of the bypass line (67, 68), which is larger in comparison with the diameter of the port.