A first balanced/unbalanced circuit is provided that splits a first mixed wave outputted from an even harmonic mixer into first and second split signals, outputs the first split signal that is in phase with the first mixed wave to a first output terminal, and outputs the second split signal that is opposite in phase to the first mixed wave to a second output terminal. Further, a second balanced/unbalanced circuit is provided that splits a second mixed wave outputted from the even harmonic mixer into third and fourth split signals, outputs the third split signal that is in phase with the second mixed wave to the second output terminal, and outputs the fourth split signal that is opposite in phase to the second mixed wave to the first output terminal.

Techniques that facilitate reconfigurable transmission of a radar frequency signal are provided. In one example, a system includes a signal generator and a power modulator. The signal generator provides a radar waveform signal from a set of radar waveform signals. The power modulator divides a local oscillator signal associated with a first frequency and a first amplitude into a first local oscillator signal and a second local oscillator signal. The power modulator also generates a radio frequency signal associated with a second frequency and a second amplitude based on the radar waveform signal, the first local oscillator signal and the second local oscillator signal.

A mixer termination circuit for a downconverter mixer includes a diplexer circuit coupled to an output of the downconverter mixer. The diplexer circuit is configured to separately terminate a sum component present in an output signal of the downconverter mixer and a difference component present in the output signal of the downconverter mixer.

A SSB (single sideband) mixer is configured to mix a first signal with a second signal, both the first signal and the second signal being a four-phase signal, and comprises eight gated inverters, each receiving a respective phase of the first signal and conditionally outputting a respective current in accordance with a control of a respective phase of the second signal, wherein currents output from the eight gated inverters are summed to establish a third signal that is a two-phase signal.

The present technology relates to a signal processing apparatus and method capable of increasing a harmonic rejection ratio while suppressing an increase in power consumption. In one aspect of the present technology, two local signals having a 1/3 duty ratio and phases mutually shifted by a 1/2 period are mixed with each signal of a differential signal, and a difference between results of the mixing of the two local signals is calculated. The present technology can be applied to, for example, a signal processing apparatus, a transmission apparatus, a reception apparatus, a communication apparatus, an electronic apparatus having a transmission function, a reception function, or a communication function, or a computer that controls those apparatuses.

The disclosure relates to technology for shifting a frequency range of a signal. In one aspect, a circuit comprises a frequency mixer, a frequency synthesizer configured to generate an oscillator signal, a programmable driver, and a controller. The programmable driver is configured to receive the oscillator signal from the frequency synthesizer and to provide the oscillator signal to the oscillator input of the frequency mixer. The programmable driver is configured to have a variable drive strength. The controller is configured to control the drive strength of the programmable driver based on a frequency of the oscillator signal to adjust a rise time and a fall time of the oscillator signal at the oscillator input of the frequency mixer.

Provided is a sine wave multiplication device of simple configuration, broad input signal level range, and minimal fluctuation in characteristics due to temperature. A signal component that corresponds to a product of an input signal Si and the third harmonic wave of a first square wave W1 included in an output signal Su1; and a signal component that corresponds to a product of the input signal Si and the fifth harmonic wave of the first square wave W1 is canceled by: a signal component that corresponds to a product of the input signal Si and the fundamental wave of a second square wave W2 included in an output signal Su2; and a signal component that corresponds to a product of the input signal Si and the fundamental wave of a second square wave W3 included in an output signal Su3.

A circuit having a first Gilbert cell mixer of a first type configured to receive phases of first and second signals and output a first current pair to a first node and a second node; a first Gilbert cell mixer of a second type configured to receive output a second current pair to the first node and the second node; a second Gilbert cell mixer of the first type configured to receive phases of the first and second signals and output a third current pair to the first node and the second node; a second Gilbert cell mixer of the second type configured to output a fourth current pair to the first node and the second node; a cross-coupling inverter pair configured to cross couple the first node and the second node; and a load placed across the first node and the second node and configured to resonate at a frequency approximately equal to either a sum of a frequency of the first signal and a frequency of the second signal or a difference of the frequency of the first signal and the frequency of the second signal.

Radio frequency (RF) mixer circuits having a complementary frequency multiplier module that requires no balun to multiply a lower frequency base oscillator signal to a higher frequency local oscillator (LO) signal, and which has a significantly reduced IC area compared to balun-based frequency multipliers. In one embodiment, the complementary frequency multiplier module includes a complementary pair of FETs controlled by an applied base oscillator signal. The complementary FETs are coupled to a common-gate FET amplifier and alternate becoming conductive in response to the base oscillator signal. The alternating switching of the complementary FETs in response to the opposing phases of the base oscillator signal cause the common-gate FET amplifier to output a higher frequency local oscillator (LO) signal. The LO signal is coupled to the LO input of a mixer or mixer core of a type suitable for use in conjunction with a frequency multiplier.

Techniques that facilitate reconfigurable transmission of a radar frequency signal are provided. In one example, a system includes a signal generator and a power modulator. The signal generator provides a radar waveform signal from a set of radar waveform signals. The power modulator divides a local oscillator signal associated with a first frequency and a first amplitude into a first local oscillator signal and a second local oscillator signal. The power modulator also generates a radio frequency signal associated with a second frequency and a second amplitude based on the radar waveform signal, the first local oscillator signal and the second local oscillator signal.