Telefonaktiebolaget Lm Ericsson (Publ)

Reza Bagger

Stefan Sahl

An electronic latch circuit, a 4-phase signal generator, a multi-stage frequency divider and a poly-phase signal generator are disclosed. The electronic latch circuit comprises an output circuit comprising a first output and a second output. The electronic latch circuit further comprises an input circuit comprising a first input, a second input and a clock signal input. The electronic latch circuit is configured to change state based on the input signals' level at the inputs of the input circuit and a present state of the output circuit. The 4-phase signal generator is built with two electronic latch circuits. The multi-stage frequency dividers and poly-phase signal generators comprise a plurality of the electronic latch circuits and 4-phase signal generators.

Multi-stage frequency dividers and poly-phase signal generators

The present invention relates to a combiner latch circuit for generation of one phase differential signal pair or two phase differential signal pairs. The combiner latch circuit comprises an input circuit configured to select a state of the output circuit from a group of: a fourth state comprising the differential output X=1, Y=0, a fifth state comprising the differential output X=0, Y=1. The input circuit is further configured to select the fourth state if the input A=0 and the input B=1 and the clock input encounter a leading edge from 0 to 1 and the output circuit is in the fifth state, and select the fifth state if the input A=1 and the input B=0 and the clock input encounter a leading edge from 0 to 1 and the output circuit is in the fourth state.

Power efficient high speed latch circuits and systems

An electronic latch circuit () and a multi-phase signal generator () are disclosed. The electronic latch circuit () comprises an output circuit () comprising a first output (X,), a second output (Y,) and a third output (Z,). The electronic latch circuit () further comprises an input circuit () comprising a first input (A,), a second input (B,) and a clock signal input (CLK,). The electronic latch circuit () is configured to change state based on input signals at the inputs (A, B, CLK) of the input circuit () and a present state of the output circuit (). The multi-phase signal generator () comprises a plurality N of the electronic latch circuit () for generating N phase signals with individual phases. The plurality N of the electronic latch circuit () are cascaded with each other.

Electronic latch circuit and a generic multi-phase signal generator

The present invention relates to an electronic latch circuit, a method, and a 4-phase generator. The electronic latch circuit comprises an output circuit comprising an output X, and an output Y. The electronic latch circuit further comprises an input circuit, comprising an input A, an input B, and a clock signal input. The input circuit is connected to the output circuit, and configured to select a state of the output circuit from the group of a first state, a second state, and a third state. The input circuit is further configured to select the first state upon detecting a high state on the input B, a transition on the clock signal input from a low state to a high state, and a low state on the input A, and that the electronic latch circuit is in the second state. The input circuit is further configured to select the second state upon detecting a high state on the input A, a low state on the input B, a low state on the clock signal input, and that the electronic latch circuit is in the first state; The input circuit is further configured to select the third state upon detecting a high state on the input A, a transition on the clock signal input from a low state to a high state, and a low state on the input B, and that the electronic latch circuit is in the second state. The input circuit is further configured to select the second state upon detecting a high state on the input A, a low state on the input B, a low state on the clock signal input, and that the electronic latch circuit is in the first state.

Electronic latch, a method for an electronic latch, a frequency division by two and a 4-phase generator

It is presented a signal generator for providing a first signal on a first output and a second signal on a second output wherein the first signal and the second signal are provided with phase shift relative to each other. The signal generator comprises: a control loop controller; a comparator; a phase shifter, the phase shifter being arranged to provide the first signal on the first output and the second signal on the second output; and a phase error detector, the inputs of which are connected to the outputs of the phase shifter and the output of which is connected to an input of the control loop controller. The output of the control loop controller is connected in a feedback loop to a first input of the comparator, and a second input of the comparator is arranged to be connected to an alternating current source.

Signal generator and associated phase shift apparatus and method

The noise response in a passive mixer circuit is improved by discharging the switching transistors in the mixer circuit in an appropriate time slot prior to activation. In addition to improving the noise response, tilt in conversion gains and linearity can be reduced. A passive mixer circuit includes bypass switches arranged in proximity to the switching transistors that make up the mixer core. These bypass switches, which are activated in intervals just prior to the active intervals of their neighboring switching transistors, discharge to ground accumulated charges on the switching transistors or on reactive components around switches.

Growing community of inventors

Järfälla, Sweden

Reza Bagger