Patent ID: 11908384
Assignee: OSRAM OPTO SEMICONDUCTORS GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 7:
8. A circuit for generating a PWM signal, comprising:
a shift register comprising a plurality of clock-controlled register units each having an input and an output,
a write unit configured to set the outputs of the register units each to a designated logical value, and
a clock generator configured to drive the register units by a common clock signal,
wherein the register units are connected in series, so that in each case a logic value at one of the outputs of the register units is applied to the input of the respective subsequent register unit,
wherein the register units are each configured to accept at their output, with each clock pulse, a logic value applied at their input,
wherein the shift register is configured to output the PWM signal at an output contact, wherein the PWM signal is a chronological sequence of the logical values set in the register units, and the PWM signal assumes each of the logical values with the duration of one clock of the clock signal,
wherein the clock signal is cyclic,
wherein during a cycle the duration of successive clocks increases,
wherein the clock signal per cycle is identical,
wherein ascending ordinal numbers are assigned to the register units starting from the output contact, and
wherein the output of the register unit with the lowest ordinal number is coupled to the input of the register unit with the highest ordinal number.