|
PLESSEY NJ88C28PR LOW NOISE PLL SYTHESIZER FREQUENCY SYNTHESISER (MICROPROCESSOR SERIAL INTERFACE) Prototyping adapters available at http://www.omega-research.co.uk/ The NJ88C28 is a synthesiser circuit fabricated on the GPS CMOS process and is capable of achieving high sideband attenuation and low noise performance. It contains a reference oscillator, 11-bit programmable reference divider, digital and sample-and-hold comparators, 10-bit programmable ‘M’ counter, 7-bit programmable ‘A’ counter and the necessary control and latch circuitry for accepting and latching the input data. Data is presented serially under external control from a suitable microprocessor. Although 28 bits of data are initially required to program all counters, subsequent updating can be abbreviated to 17 bits, when only the ‘A’ and ‘M’ counters require changing. The NJ88C28 is intended to be used in conjunction with a two-modulus prescaler such as the SP8715 series to produce a universal binary coded synthesiser for up to 1100MHz operation. High Performance Sample and Hold Phase Detector Serial Input with Fast Update Feature http://f5soh.free.fr/ftp/Doc/PLL/nj88c28 22NJ88C28 (all content is the responsibility of the poster) |
Clifford.fitzpatrick@oklahomaselltoday.com (Clifford Fitzpatrick) for more information. All emails will be forwarded to the poster's actual email address.