摘要:
A voltage converter (10) comprises an input (11) for receiving an input voltage (VIN), a first output (12) for providing a first output voltage (VPOS) and a second output (13) for providing a second output voltage (VNEG). The first output voltage (VPOS) and the second output voltage (VNEG) have opposite polarities. A switching arrangement (14) of the voltage converter (10) is designed to provide energy to an inductor (15) in a charging phase (A) of operation and to provide energy from the inductor (15) to the first output (12) and, via a flying capacitor (16), to the second output (13) in a discharging phase of operation. The first duration (t1) of the charging phase (A) of operation is controlled such that the difference between a first predetermined value and the sum of the absolute value of the first output voltage (VPOS) and of the second output voltage (VNEG) is minimized.
摘要:
A filtering arrangement comprises a reference voltage input (1) and a compensation current arrangement (10) coupled to the reference voltage input (1) and configured to provide a control current at a current output (2) as a function of a voltage at the reference voltage input (1). The filtering arrangement also comprises a first and a second current source (20, 30) each having a control input (4, 5) coupled to the current output (2), a first and a second filter input (7, 8), and a first transistor (T1) and a second transistor (T2). The first transistor (T1) has a first connection (T11), a second connection (T12) and a control connection (T1c), where its first connection (T11) is coupled to the first current source (20) and its second connection (T12) is coupled to the first filter input (7) through a first resistor (R1). The second transistor (T2) has a first connection (T21), a second connection (T22) and a control connection (T2c), where its first connection T21) is coupled to the second current source (30), its second connection (T22) is coupled to the second filter input (8) through a second resistor (R2) and its control connection (T2c) is coupled to its first connection (T21) and to the control connection (T1c) of the first transistor (T1). A capacitive element (C1) is coupled between the first connection (T11) of the first transistor (T1) and the second connection (T22) of the second transistor (T2) and a filter output (6) is coupled to the first connection (T11) of the first transistor (T1).
摘要:
A voltage converter (10) comprises an input (11) for receiving an input voltage (VIN), a first output (12) for providing a first output voltage (VPOS) and a second output (13) for providing a second output voltage (VNEG). The first output voltage (VPOS) and the second output voltage (VNEG) have opposite polarities. A switching arrangement (14) of the voltage converter (10) is designed to provide energy to an inductor (15) in a charging phase (A) of operation and to provide energy from the inductor (15) to the first output (12) and, via a flying capacitor (16), to the second output (13) in a discharging phase of operation. The first duration (t1) of the charging phase (A) of operation is controlled such that the difference between a first predetermined value and the sum of the absolute value of the first output voltage (VPOS) and of the second output voltage (VNEG) is minimized.
摘要:
A voltage/current converter circuit includes a bridge configuration having a first current path with a first resistor, a first transistor, and an input node to receive a ramp voltage to be converted, and a second current path with a second resistor and a second transistor. A current passes through the second current path. An amplifier arrangement balances the bridge configuration by providing an output signal to a control terminal of the first transistor and/or to a control terminal of the second transistor.
摘要:
A method for DC/DC conversion which comprises the steps of controlling a first switch (10) for coupling a supply terminal (5) to a first terminal (60) of an inductor (2) and a second switch (20) for coupling the first terminal (60) to a ground potential terminal (8). The method further comprises controlling a third switch (30) for coupling a second terminal (61) of the inductor (2) to the ground potential terminal (8) and a fourth switch (40) for coupling the second terminal (61) to an output terminal (6). A control sequence is used to control the four switches (10, 20, 30, 40) using four switching phases (A, B, C, D). A maximum of two switches out of the four switches (10, 20, 30, 40) change their switching position at a respective transition of subsequent switching phases (A, B, C, D).
摘要:
A voltage/current converter circuit includes a bridge configuration having a first current path with a first resistor, a first transistor, and an input node to receive a ramp voltage to be converted, and a second current path with a second resistor and a second transistor. A current passes through the second current path. An amplifier arrangement balances the bridge configuration by providing an output signal to a control terminal of the first transistor and/or to a control terminal of the second transistor.
摘要:
A multi-current-source comprises a voltage converter (VC), a first current source (CS1) with a first terminal (A1) which is adapted to be coupled to an output (OUT) of a voltage converter (VC) and with a second terminal (B1) which is adapted to be coupled to an input (IN) of the voltage converter (VC), at least a second current source (CS2) with a first terminal (A2) which is adapted to be coupled to the output (OUT) of the voltage converter (VC) and with a second terminal (B2) which is adapted to be coupled to the input (IN) of the voltage converter (VC), wherein the first current source (CS1) being adapted to provide a first load current (Il1) at its first terminal (A1) the first load current (Il1) being regulated to a first constant value and to provide a first unidirectional error current (Ierr1) at its second terminal (B1), wherein the at least one second current source (CS2) being adapted to provide a second load current (Il2) at its first terminal (A2), the second load current (Il2) being regulated to a second constant value and to provide a second unidirectional error current (Ierr2) at its second terminal (B2), such that a sum of the first unidirectional error current (Ierr1) and the second unidirectional error current (Ierr2) adjusts the first and the second load current (Il1, Il2).
摘要:
A controlled current source comprises a signal input to receive a control input bus signal (D0, . . . , D[n−1]), a mapping unit (MU) with an input coupled to the signal input and an output to provide an internal control bus signal (d0, . . . , dn, Hc), a reference generator (RG) with an input coupled to the output of the mapping unit (MU) and with a low reference output to provide a low reference potential (Vgl) and with a high reference output to provide a high reference potential (Vgh), a current generating unit (CG) with a first input coupled to the output of the mapping unit (MU), a second input coupled to the output of the reference generator (RG) and an output to provide an output current (Iout) controlled by the control input bus signal (D0, . . . , D[n−1]) and the low and high reference potentials (Vgh, Vgl). Furthermore, a method for sourcing a current is provided.
摘要:
A filtering arrangement comprises a reference voltage input (1) and a compensation current arrangement (10) coupled to the reference voltage input (1) and configured to provide a control current at a current output (2) as a function of a voltage at the reference voltage input (1). The filtering arrangement also comprises a first and a second current source (20, 30) each having a control input (4, 5) coupled to the current output (2), a first and a second filter input (7, 8), and a first transistor (T1) and a second transistor (T2). The first transistor (T1) has a first connection (T11), a second connection (T12) and a control connection (T1c), where its first connection (T11) is coupled to the first current source (20) and its second connection (T12) is coupled to the first filter input (7) through a first resistor (R1). The second transistor (T2) has a first connection (T21), a second connection (T22) and a control connection (T2c), where its first connection T21) is coupled to the second current source (30), its second connection (T22) is coupled to the second filter input (8) through a second resistor (R2) and its control connection (T2c) is coupled to its first connection (T21) and to the control connection (T1c) of the first transistor (T1). A capacitive element (C1) is coupled between the first connection (T11) of the first transistor (T1) and the second connection (T22) of the second transistor (T2) and a filter output (6) is coupled to the first connection (T11) of the first transistor (T1).
摘要:
A method for DC/DC conversion comprises operating in a Boost mode of operation or in a Buck-Boost mode of operation. Furthermore, the method comprises switching from the Boost mode of operation to the Buck-Boost mode of operation, if a desired value (VOUTR) of an output voltage (VOUT) which is generated from a supply voltage (VIN) by the DC/DC conversion is smaller than a first reference voltage (VR1). The method also comprises switching from the Buck-Boost mode of operation to the Boost mode of operation, if the desired value (VOUTR) is larger than a second reference voltage (VR2).