Search for "wide band 90 degree phase shift", e.g.do you have any link to some literature.
90 deg (exact !) over such a frequency range is impossible.Hi,
I am looking for a phase-shifter circuit, that can shift a signal with 90 degrees - over a frequency range (eg. 50kHz to 200 kHz). Any suggestion?
Inetresting, it is an analog signal. Can I generate sine waves in PSoC5?Is this an analog or digital signal you want phase shifted ?
Two wideband transconductance amplifiers produce an allpass network. Combining two such networks as shown in the illustration produces two outputs with a constant 90 degree phase shift (vs. frequency) between them.www.maximintegrated.com
https://community.cypress.com/message/142285#142285 Project using hilbert transform filter
Single chip approach -
View attachment 164992
Yes on sine with WaveDAC component. In PSOC land a component
is an onchip resource. What freqs do you need ?
Attached is a component catalog for PSOC 5LP, there are lower end familes
with not as many on chip components. On chip you have logic, LUTs, DACs
OpAmps, Comparators, serial COM like USB, SPI, I2C, UART. DSP, PWM, Counters,
Timers, QuadDec, DDS.... Youc an do custom compoennts using the fabric as
well, I did a SIPO 64 bit shifter recently to learn. There is a community of folks
that have created some components not in standard IDE, like DDS, 74HC
type logic, CORDIC
The low end board is $ 10, complete with debug.
View attachment 165007
A board with more I/o, and higher cost - https://www.sparkfun.com/products/13714
IDE, PSOC Creator, and compiler free.
Ok thanks. 180kHz is unfortunately not enough for me.I did a work around to run the WaveDAC8 at ~ 12 Mhz sample rate, 16 samples/cycle,
and got ~ 144 Khz sine, third harmonic was 25 db down. Keep in mind the sample rate
is set by the DMA rate (and its cycles needed).
This violated the timing on the VDAC8 used inside the WaveDAC8, so is not really a reproducible
I am going with the all-pass filter. Do you have any suggestions for a good Op-Amp ( I am running from 50kHz to 400kHz). I am thinking the GBW should be 20 X400 kHz and with low slew-rate?Really depends on what you want to achieve. PLL can generate a signal phase shifted relative to a reference input, usually with fixed magnitude.
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To be tracked by a PLL, the reference signal must be single frequency and quasi stationary.