50 MHz instruments employ dedicated pulse generator design

May 17, 2016 // By Graham Prophet
Setting what makers Aim-TTi claim as a new price/performance point, these signal sources in the TGP3100 Series are true pulse generators, single or dual channel, operating at up to 50MHz.

Unlike DDS function generators that also incorporate a pulse generator capability, the TGP3100 series has a dedicated pulse generator architecture enabling a much higher resolution of pulse width and delay, and asynchronous operation with minimal jitter.

Existing dedicated pulse generators, the company says, have their origins in the analogue world and typically retain function-specific hardware blocks to achieve performance. These units operate within the digital domain.


The TGP3100 series can generate pulses from 1 mHz up to 50 MHz with pulse width and delay resolutions of 100 psec. Independently variable rise and fall times can be set from 5 nsec up to 800 seconds. PWM and PDM (pulse width and pulse delay modulation) are incorporated; unlike certain other pulse generators, AM, FM, PM, SUM, FSK and BPSK modulations are also possible.


Double pulse and user-defined pulse pattern operation is available, the latter having up to 65536 bits. PRBS (Pseudo-Random Bit Sequence) sequence patterns can be created with lengths between 127 and 8,388,607 bits.


Time delay compensated external triggering allows asynchronous pulse generation with variable delay and minimal jitter. An external width mode allows asynchronous pulse reconstruction.


A high drive capability output stage can achieve 20 Vpk-pk into a 50 Ohm load. Fully variable output voltage can be load-impedance compensated over a wide range with a minimum output level of 10 mVpk-pk.


In addition to their operation as true pulse generators, the TGP3100 series can act as high performance noise generators and as full arbitrary/function generators making them universal waveform generators. Sine waves are available up to 50 MHz and fifteen other standard waveforms are provided. Arbitrary waveforms have 16 bit resolution with an 800 Msample/sec rate.


Single and dual channel models are available. The Dual channel model include two independent generators with facilities for coupled and tracking operation.


Aim-TTi; www.aimtti.com